fix portability connection in DB2
fix portability connection in DB2

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