minor #17151 [travis] timeout the sigchild tests at 60s (nicolas-grekas)
minor #17151 [travis] timeout the sigchild tests at 60s (nicolas-grekas)

This PR was merged into the 2.3 branch.

Discussion
----------

[travis] timeout the sigchild tests at 60s

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

[Sometimes](https://travis-ci.org/symfony/symfony/jobs/98790028#L2774), the tests of the process component with sigchild enabled are terminated by travis after 10 minutes of no activity.
In order to free the failing job faster and to get some output, let's kill the job ourselves after 60s (running the test suite usually takes ~8s on travis)

Commits
-------

f78e794 [travis] timeout the sigchild tests at 60s

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