add class and object fetch modes support in DB2
add class and object fetch modes support in DB2

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