minor #16047 [travis] Skip testing intermediate PHP versions on pull requests (nicolas-grekas)
minor #16047 [travis] Skip testing intermediate PHP versions on pull requests (nicolas-grekas)

This PR was merged into the 2.3 branch.

Discussion
----------

[travis] Skip testing intermediate PHP versions on pull requests

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

I've never seen a build fail exclusively on 5.4/5.5. But for sure, this could happen.
Thus, to get results faster, I propose to skip the corresponding matrix lines on pull requests but keep them when testing branches.

Commits
-------

99c1cd7 [travis] Skip testing intermediate PHP versions on pull requests

calm10/Symfony2,Strate/symfony,Rvanlaak/symfony,SaschaDens/symfony,smatyas/symfony,dzuelke/symfony,zerustech/symfony,lstrojny/symfony,apetitpa/symfony,zorn-v/symfony,jamyouss/symfony,andreia/symfony,jakzal/symfony,hacfi/symfony,raziel057/symfony,jean-gui/symfony,Tobion/symfony,vincentaubert/symfony,MatTheCat/symfony,weaverryan/symfony,Rvanlaak/symfony,michaelperrin/symfony,moycarretero/behat,yceruto/symfony,gencer/symfony,jakubsacha/symfony,lyrixx/symfony,1ed/symfony,ragboyjr/symfony,Koc/symfony,smatyas/symfony,beoboo/symfony,pierredup/symfony,alekitto/symfony,zerustech/symfony,SaschaDens/symfony,HeahDude/symfony,apfelbox/symfony,tronsha/symfony,razmo/symfony,k0pernikus/symfony,phramz/symfony,dosten/symfony,danionut90/symfony,csarrazi/symfony,andreia/symfony,mihai-stancu/symfony,hason/symfony,josephdpurcell/symfony,tPl0ch/symfony,backbone87/symfony,oleg-andreyev/symfony,SpacePossum/symfony,SpacePossum/symfony,mvhirsch/symfony,ewgRa/symfony,Simperfit/symfony,MisatoTremor/symfony,paradajozsef/symfony,codeclimate-testing/symfony,havvg/symfony,ro0NL/symfony,sstok/symfony,ewgRa/symfony,jameshalsall/symfony,bburnichon/symfony,romainneutron/symfony,OndraM/symfony,damienalexandre/symfony,danionut90/symfony,dzuelke/symfony,xabbuh/symfony,arjenm/symfony,romainneutron/symfony,geoffrey-brier/symfony,fabpot/symfony,razmo/symfony,aeoris/symfony,thunderer/symfony,hason/symfony,zerkms/symfony,peterrehm/symfony,jakubsacha/symfony,mvhirsch/symfony,adamelso/symfony,AlexDpy/symfony,arjenm/symfony,kbond/symfony,ewgRa/symfony,Strate/symfony,realityking/symfony,iltar/symfony,gnat42/symfony,jjanvier/symfony,mvhirsch/symfony,pyrech/symfony,smatyas/symfony,apfelbox/symfony,lyrixx/symfony,mickaelandrieu/symfony,DavidGarciaCat/symfony,thunderer/symfony,zcodes/symfony,gencer/symfony,OndraM/symfony,pyrech/symfony,voronkovich/symfony,HeahDude/symfony,dosten/symfony,jelte/symfony,Nyholm/symfony,garak/symfony,tronsha/symfony,jelte/symfony,tgalopin/symfony,pamil/symfony,tPl0ch/symfony,oleg-andreyev/symfony,lstrojny/symfony,romaricdrigon/symfony,jvasseur/symfony,geoffrey-brier/symfony,codeclimate-testing/symfony,bburnichon/symfony,mpdude/symfony,Amo/symfony,Soullivaneuh/symfony,arjenm/symfony,ragboyjr/symfony,zerustech/symfony,MisatoTremor/symfony,weaverryan/symfony,danionut90/symfony,mweimerskirch/symfony,sstok/symfony,alebo/symfony,joelwurtz/symfony,calm10/Symfony2,yceruto/symfony,chrisguitarguy/symfony,codeclimate-testing/symfony,dosten/symfony,natechicago/symfony,adamelso/symfony,jameshalsall/symfony,dawehner/symfony,damienalexandre/symfony,nicolas-grekas/symfony,chalasr/symfony,andreia/symfony,calm10/Symfony2,WhiteEagle88/symfony,curry684/symfony,jderusse/symfony,csarrazi/symfony,mnapoli/symfony,OskarStark/symfony,codeclimate-testing/symfony,jjanvier/symfony,mihai-stancu/symfony,AlexDpy/symfony,jelte/symfony,bendavies/symfony,dunglas/symfony,aeoris/symfony,superdav42/symfony,nicolas-grekas/symfony,jpauli/symfony,ro0NL/symfony,peterjmit/symfony,tgalopin/symfony,sstok/symfony,docteurklein/symfony,WouterJ/symfony,lepiaf/symfony,webmozart/symfony,pix-art/symfony,zcodes/symfony,michaelperrin/symfony,ewgRa/symfony,mweimerskirch/symfony,shieldo/symfony,maidmaid/symfony,alebo/symfony,raziel057/symfony,michaelperrin/symfony,apetitpa/symfony,fabpot/symfony,pix-art/symfony,apetitpa/symfony,superdav42/symfony,inso/symfony,Pierstoval/symfony,inso/symfony,localheinz/symfony,gonzalovilaseca/symfony,SpacePossum/symfony,mnapoli/symfony,MatTheCat/symfony,dunglas/symfony,DavidGarciaCat/symfony,frankdejonge/symfony,ogizanagi/symfony,localheinz/symfony,OskarStark/symfony,digitalkaoz/symfony,bburnichon/symfony,EVODelavega/symfony,jderusse/symfony,mihai-stancu/symfony,Slamdunk/symfony,Pierstoval/symfony,phramz/symfony,nicolas-grekas/symfony,inso/symfony,teohhanhui/symfony,apfelbox/symfony,ewgRa/symfony,neemzy/symfony,jean-gui/symfony,klandaika/symfony,kbond/symfony,webmozart/symfony,deguif/symfony,natechicago/symfony,vincentaubert/symfony,ro0NL/symfony,geoffrey-brier/symfony,alekitto/symfony,tronsha/symfony,unexge/symfony,jderusse/symfony,symfony/symfony,pierredup/symfony,voronkovich/symfony,mnapoli/symfony,jvasseur/symfony,Rvanlaak/symfony,mickaelandrieu/symfony,Deamon/symfony,paradajozsef/symfony,Ener-Getick/symfony,Nyholm/symfony,MisatoTremor/symfony,mvhirsch/symfony,tronsha/symfony,k0pernikus/symfony,vincentaubert/symfony,backbone87/symfony,maidmaid/symfony,natechicago/symfony,mihai-stancu/symfony,Koc/symfony,adamelso/symfony,Wasserschlange/symfony,sroze/symfony,curry684/symfony,jameshalsall/symfony,Amo/symfony,WouterJ/symfony,unexge/symfony,iltar/symfony,realityking/symfony,thunderer/symfony,patrick-mcdougle/symfony,e-moe/symfony,jzawadzki/symfony,Triiistan/symfony,sroze/symfony,romainneutron/symfony,MatTheCat/symfony,smatyas/symfony,dkarvounaris/symfony,dbu/symfony,Ocramius/symfony,d-ph/symfony,Simperfit/symfony,1ed/symfony,Ener-Getick/symfony,EVODelavega/symfony,gimler/symfony,webmozart/symfony,frankdejonge/symfony,zerkms/symfony,curry684/symfony,zerustech/symfony,Ener-Getick/symfony,beoboo/symfony,lemoinem/symfony,Ocramius/symfony,andrerom/symfony,hhamon/symfony,andreia/symfony,e-moe/symfony,SpacePossum/symfony,dkarvounaris/symfony,Triiistan/symfony,peterjmit/symfony,zorn-v/symfony,realityking/symfony,gonzalovilaseca/symfony,jeremyFreeAgent/symfony,mpdude/symfony,ajgarlag/symfony,beoboo/symfony,Nyholm/symfony,sgehrig/symfony,Ener-Getick/symfony,teohhanhui/symfony,believer-ufa/symfony,garak/symfony,GuilhemN/symfony,k0pernikus/symfony,dmaicher/symfony,frankdejonge/symfony,HeahDude/symfony,nasimnabavi/symfony,jakzal/symfony,backbone87/symfony,hhamon/symfony,Triiistan/symfony,OndraM/symfony,c960657/symfony,bburnichon/symfony,jakzal/symfony,Taluu/symfony,tronsha/symfony,apfelbox/symfony,razmo/symfony,dbu/symfony,patrick-mcdougle/symfony,nasimnabavi/symfony,Ocramius/symfony,garak/symfony,jpauli/symfony,realityking/symfony,danionut90/symfony,EVODelavega/symfony,damienalexandre/symfony,jelte/symfony,ogizanagi/symfony,mickaelandrieu/symfony,bburnichon/symfony,arjenm/symfony,unexge/symfony,klandaika/symfony,josephdpurcell/symfony,zcodes/symfony,georaldc/symfony,sgehrig/symfony,tucksaun/symfony,ogizanagi/symfony,tucksaun/symfony,curry684/symfony,mihai-stancu/symfony,jakubsacha/symfony,dkarvounaris/symfony,peterjmit/symfony,Amo/symfony,havvg/symfony,derrabus/symfony,k0pernikus/symfony,dbu/symfony,OndraM/symfony,digitalkaoz/symfony,hiddewie/symfony,Soullivaneuh/symfony,MisatoTremor/symfony,jvasseur/symfony,Pierstoval/symfony,jjanvier/symfony,natechicago/symfony,Padam87/symfony,d-ph/symfony,chrisguitarguy/symfony,pamil/symfony,believer-ufa/symfony,pyrech/symfony,e-moe/symfony,lemoinem/symfony,mickaelandrieu/symfony,weaverryan/symfony,Deamon/symfony,alekitto/symfony,Taluu/symfony,dosten/symfony,pix-art/symfony,believer-ufa/symfony,unexge/symfony,Taluu/symfony,gimler/symfony,Deamon/symfony,MAXakaWIZARD/symfony,Rvanlaak/symfony,superdav42/symfony,pamil/symfony,zorn-v/symfony,hacfi/symfony,jakubsacha/symfony,SofHad/symfony,pamil/symfony,zerkms/symfony,Soullivaneuh/symfony,gonzalovilaseca/symfony,paradajozsef/symfony,symfony/symfony,Wasserschlange/symfony,mpdude/symfony,superdav42/symfony,dkarvounaris/symfony,raziel057/symfony,deguif/symfony,d-ph/symfony,hiddewie/symfony,bendavies/symfony,Wasserschlange/symfony,csarrazi/symfony,SofHad/symfony,jameshalsall/symfony,voronkovich/symfony,gnat42/symfony,geoffrey-brier/symfony,dbu/symfony,adamelso/symfony,alebo/symfony,apfelbox/symfony,romainneutron/symfony,jakzal/symfony,sstok/symfony,jeremyFreeAgent/symfony,superdav42/symfony,ogizanagi/symfony,neemzy/symfony,Amo/symfony,docteurklein/symfony,alebo/symfony,damienalexandre/symfony,georaldc/symfony,chrisguitarguy/symfony,Ocramius/symfony,inso/symfony,hhamon/symfony,MatTheCat/symfony,dbu/symfony,danionut90/symfony,voronkovich/symfony,havvg/symfony,sroze/symfony,jean-gui/symfony,jderusse/symfony,jean-gui/symfony,Slamdunk/symfony,lyrixx/symfony,SpacePossum/symfony,inso/symfony,raziel057/symfony,MisatoTremor/symfony,maidmaid/symfony,docteurklein/symfony,lyrixx/symfony,believer-ufa/symfony,fabpot/symfony,Soullivaneuh/symfony,Einenlum/symfony,weaverryan/symfony,zcodes/symfony,Simperfit/symfony,sgehrig/symfony,lstrojny/symfony,Padam87/symfony,realityking/symfony,geoffrey-brier/symfony,joelwurtz/symfony,okdana/symfony,Slamdunk/symfony,adamelso/symfony,deguif/symfony,Triiistan/symfony,hiddewie/symfony,chrisguitarguy/symfony,jzawadzki/symfony,HeahDude/symfony,sroze/symfony,ajgarlag/symfony,AlexDpy/symfony,beoboo/symfony,Taluu/symfony,DavidGarciaCat/symfony,pix-art/symfony,Triiistan/symfony,jpauli/symfony,Strate/symfony,pix-art/symfony,danionut90/symfony,EVODelavega/symfony,mnapoli/symfony,gonzalovilaseca/symfony,SofHad/symfony,peterrehm/symfony,hiddewie/symfony,yceruto/symfony,jakubsacha/symfony,dawehner/symfony,yceruto/symfony,klandaika/symfony,neemzy/symfony,Rvanlaak/symfony,pierredup/symfony,beoboo/symfony,shieldo/symfony,moycarretero/behat,paradajozsef/symfony,zorn-v/symfony,GuilhemN/symfony,digitalkaoz/symfony,mvhirsch/symfony,jpauli/symfony,georaldc/symfony,MAXakaWIZARD/symfony,nasimnabavi/symfony,okdana/symfony,derrabus/symfony,Ocramius/symfony,calm10/Symfony2,teohhanhui/symfony,Einenlum/symfony,aeoris/symfony,Engerim/symfony,zerustech/symfony,symfony/symfony,pyrech/symfony,digitalkaoz/symfony,havvg/symfony,patrick-mcdougle/symfony,sgehrig/symfony,Soullivaneuh/symfony,EVODelavega/symfony,dzuelke/symfony,Aliance/symfony,romaricdrigon/symfony,mickaelandrieu/symfony,jpauli/symfony,Koc/symfony,GuilhemN/symfony,klandaika/symfony,mweimerskirch/symfony,jeremyFreeAgent/symfony,josephdpurcell/symfony,AlexDpy/symfony,ro0NL/symfony,chalasr/symfony,Aliance/symfony,hiddewie/symfony,stof/symfony,webmozart/symfony,nasimnabavi/symfony,peterrehm/symfony,geoffrey-brier/symfony,lemoinem/symfony,raziel057/symfony,WouterJ/symfony,e-moe/symfony,joelwurtz/symfony,tPl0ch/symfony,Amo/symfony,moycarretero/behat,thunderer/symfony,jamyouss/symfony,OskarStark/symfony,Tobion/symfony,phramz/symfony,jeremyFreeAgent/symfony,SaschaDens/symfony,mweimerskirch/symfony,SaschaDens/symfony,Aliance/symfony,havvg/symfony,chalasr/symfony,gnat42/symfony,gimler/symfony,maidmaid/symfony,joelwurtz/symfony,patrick-mcdougle/symfony,ajgarlag/symfony,georaldc/symfony,localheinz/symfony,d-ph/symfony,andrerom/symfony,webmozart/symfony,jeremyFreeAgent/symfony,phramz/symfony,Padam87/symfony,dmaicher/symfony,Simperfit/symfony,ragboyjr/symfony,gimler/symfony,MAXakaWIZARD/symfony,moycarretero/behat,andrerom/symfony,pix-art/symfony,michaelperrin/symfony,docteurklein/symfony,tucksaun/symfony,okdana/symfony,xabbuh/symfony,docteurklein/symfony,OndraM/symfony,andrerom/symfony,k0pernikus/symfony,sstok/symfony,natechicago/symfony,jjanvier/symfony,mpdude/symfony,tucksaun/symfony,ewgRa/symfony,gnat42/symfony,localheinz/symfony,dawehner/symfony,georaldc/symfony,Einenlum/symfony,razmo/symfony,AlexDpy/symfony,Nyholm/symfony,Ener-Getick/symfony,jamyouss/symfony,georaldc/symfony,jjanvier/symfony,symfony/symfony,OskarStark/symfony,dkarvounaris/symfony,GuilhemN/symfony,derrabus/symfony,Wasserschlange/symfony,SofHad/symfony,lepiaf/symfony,Engerim/symfony,stof/symfony,dawehner/symfony,zerkms/symfony,MAXakaWIZARD/symfony,bendavies/symfony,jameshalsall/symfony,thunderer/symfony,jzawadzki/symfony,fabpot/symfony,romainneutron/symfony,mweimerskirch/symfony,moycarretero/behat,apetitpa/symfony,dawehner/symfony,peterrehm/symfony,1ed/symfony,SofHad/symfony,dosten/symfony,dmaicher/symfony,Einenlum/symfony,Ocramius/symfony,ajgarlag/symfony,hason/symfony,believer-ufa/symfony,romaricdrigon/symfony,mnapoli/symfony,frankdejonge/symfony,peterjmit/symfony,iltar/symfony,natechicago/symfony,pierredup/symfony,tgalopin/symfony,MAXakaWIZARD/symfony,believer-ufa/symfony,jvasseur/symfony,unexge/symfony,c960657/symfony,shieldo/symfony,romaricdrigon/symfony,stof/symfony,Pierstoval/symfony,tPl0ch/symfony,1ed/symfony,dmaicher/symfony,nicolas-grekas/symfony,SaschaDens/symfony,Ener-Getick/symfony,jelte/symfony,tPl0ch/symfony,kbond/symfony,Tobion/symfony,razmo/symfony,dunglas/symfony,WhiteEagle88/symfony,dzuelke/symfony,digitalkaoz/symfony,oleg-andreyev/symfony,oleg-andreyev/symfony,realityking/symfony,Deamon/symfony,kbond/symfony,tronsha/symfony,jpauli/symfony,gencer/symfony,superdav42/symfony,alebo/symfony,alekitto/symfony,bendavies/symfony,deguif/symfony,xabbuh/symfony,vincentaubert/symfony,chalasr/symfony,iltar/symfony,c960657/symfony,MisatoTremor/symfony,Padam87/symfony,Wasserschlange/symfony,Engerim/symfony,c960657/symfony,calm10/Symfony2,hhamon/symfony,tgalopin/symfony,peterjmit/symfony,lemoinem/symfony,jamyouss/symfony,Tobion/symfony,lepiaf/symfony,jamyouss/symfony,smatyas/symfony,Koc/symfony,shieldo/symfony,WhiteEagle88/symfony,Deamon/symfony,xabbuh/symfony,hacfi/symfony,patrick-mcdougle/symfony,stof/symfony,chrisguitarguy/symfony,ragboyjr/symfony,klandaika/symfony,GuilhemN/symfony,peterrehm/symfony,dzuelke/symfony,Simperfit/symfony,Padam87/symfony,teohhanhui/symfony,lemoinem/symfony,Slamdunk/symfony,derrabus/symfony,garak/symfony