Fixed alterTable and dropIndex
Fixed alterTable and dropIndex

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