added (failing on HHVM) test for pubsub with read_write_timeout=-1
added (failing on HHVM) test for pubsub with read_write_timeout=-1

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