Updating operator development guide
Updating operator development guide

vrozov/incubator-apex-core,sandeshh/incubator-apex-core,ishark/incubator-apex-core,mattqzhang/apex-core,tweise/incubator-apex-core,deepak-narkhede/apex-core,tweise/incubator-apex-core,ishark/incubator-apex-core,sandeshh/apex-core,vrozov/apex-core,PramodSSImmaneni/apex-core,devtagare/incubator-apex-core,tushargosavi/incubator-apex-core,tweise/apex-core,PramodSSImmaneni/incubator-apex-core,devtagare/incubator-apex-core,tushargosavi/apex-core,sandeshh/incubator-apex-core,chinmaykolhatkar/incubator-apex-core,PramodSSImmaneni/incubator-apex-core,deepak-narkhede/apex-core,chinmaykolhatkar/incubator-apex-core,tweise/incubator-apex-core,apache/incubator-apex-core,mattqzhang/apex-core,sandeshh/apex-core,vrozov/apex-core,tweise/apex-core,brightchen/incubator-apex-core,simplifi-it/otterx,vrozov/incubator-apex-core,brightchen/apex-core,tweise/apex-core,devtagare/incubator-apex-core,apache/incubator-apex-core,tushargosavi/apex-core,tushargosavi/incubator-apex-core,simplifi-it/otterx,deepak-narkhede/apex-core,PramodSSImmaneni/incubator-apex-core,brightchen/incubator-apex-core,simplifi-it/otterx,chinmaykolhatkar/incubator-apex-core,PramodSSImmaneni/apex-core,vrozov/incubator-apex-core,sandeshh/incubator-apex-core,vrozov/apex-core,sandeshh/apex-core,ishark/incubator-apex-core,apache/incubator-apex-core,mattqzhang/apex-core,brightchen/apex-core,PramodSSImmaneni/apex-core,tushargosavi/incubator-apex-core,brightchen/apex-core,tushargosavi/apex-core