Fix database handling in Predis\MonitorContext.
Fix database handling in Predis\MonitorContext.

johnhelmuth/predis,SwelenFrance/predis,nguyenthaihan/predis,quangnguyen90/predis,protomouse/predis,zhangyancoder/predis,lvbaosong/predis,gencer/predis,channelgrabber/predis,mrkeng/predis,dominics/predis,moria/predis,vend/predis,stokes3452/predis,dzung2t/predis,WalterShe/predis,RudyJessop/predis,SecureCloud-biz/predis,nrk/predis,gopalindians/predis,RedisLabs/predis,oswaldderiemaecker/predis,CloudSide/predis