[2.0][DBAL][DWEB-51] Fixing code example for schema manager
[2.0][DBAL][DWEB-51] Fixing code example for schema manager

mRoca/dbal,v-bartusevicius/dbal,sarcher/dbal,mariuz/dbal,janschoenherr/dbal,mRoca/dbal,LionwareSolutions/dbal,PowerKiKi/dbal,nfrignani/dbal,easybiblabs/dbal,gencer/dbal,v-bartusevicius/dbal,bspeterson/dbal,arima-ryunosuke/dbal,tk-s/dbal,stchr/dbal,vortgo/dbal,drieschel/dbal,lafourchette/dbal,drieschel/dbal,hason/dbal,adrienbrault/dbal,helicon-os/doctrine-dbal,AlexDpy/dbal,kupishkis/dbal,vortgo/dbal,mathroc/dbal,sarcher/dbal,easybiblabs/dbal,stof/dbal,vutung2311/dbal,mbeccati/dbal,Ocramius/dbal,PowerKiKi/dbal,DataSyntax/dbal,BenMorel/dbal,janschoenherr/dbal,stchr/dbal,bspeterson/dbal,DHager/dbal,arima-ryunosuke/dbal,kimhemsoe/dbal,helicon-os/doctrine-dbal,webonyx/dbal,webonyx/dbal,Ocramius/dbal,mariuz/dbal,mihai-stancu/dbal,vutung2311/dbal,LionwareSolutions/dbal,cassvail/dbal,mihai-stancu/doctrine-dbal,LionwareSolutions/dbal,cassvail/dbal,adrienbrault/dbal,doctrine/dbal,mariuz/dbal,kupishkis/dbal,PowerKiKi/dbal,sarcher/dbal,kimhemsoe/dbal,DHager/dbal,mikeSimonson/dbal,mbeccati/dbal,doctrine/dbal,mikeSimonson/dbal,AlexDpy/dbal,mihai-stancu/dbal,nfrignani/dbal,wuxu92/dbal,shivergard/dbal,zeroedin-bill/dbal,deeky666/dbal,stof/dbal,tk-s/dbal,hason/dbal,kupishkis/dbal,zeroedin-bill/dbal,gencer/dbal,wuxu92/dbal,lafourchette/dbal,easybiblabs/dbal,adrienbrault/dbal,lcobucci/dbal,mathroc/dbal,shivergard/dbal,Tobion/dbal,Tobion/dbal,BenMorel/dbal,deeky666/dbal,arima-ryunosuke/dbal,mihai-stancu/doctrine-dbal,hason/dbal,DataSyntax/dbal,webonyx/dbal,lcobucci/dbal