[DomCrawler] Remove the overridden getHash() method to prevent problems when cloning the crawler
[DomCrawler] Remove the overridden getHash() method to prevent problems when cloning the crawler

Overriding the SplObjectStorage::getHash() is affected by a PHP bug (https://bugs.php.net/bug.php?id=67582),
which makes the Crawler unusable in Symfony 2.8 for anyone who relied on SplObjectStorage methods.
Removing the getHash() method means we will no longer trigger the deprecation error. Given this method
is unlikely to be used directly and other SplObjectStorage methods will trigger the error, it is the simplest
thing we can do to maintain BC.

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