allow es _source to be an attr instead of key
allow es _source to be an attr instead of key

andymckay/zamboni,jasonthomas/zamboni,mozilla/zamboni,clouserw/zamboni,Hitechverma/zamboni,ingenioustechie/zamboni,Jobava/zamboni,andymckay/zamboni,mudithkr/zamboni,kumar303/zamboni,washort/zamboni,ngokevin/zamboni,washort/zamboni,luckylavish/zamboni,jasonthomas/zamboni,Jobava/zamboni,kumar303/zamboni,diox/zamboni,clouserw/zamboni,eviljeff/zamboni,jasonthomas/zamboni,mozilla/zamboni,shahbaz17/zamboni,ayushagrawal288/zamboni,mstriemer/zamboni,ingenioustechie/zamboni,mudithkr/zamboni,jamesthechamp/zamboni,shahbaz17/zamboni,ddurst/zamboni,diox/zamboni,jamesthechamp/zamboni,Jobava/zamboni,eviljeff/zamboni,ddurst/zamboni,ayushagrawal288/zamboni,tsl143/zamboni,mstriemer/zamboni,Hitechverma/zamboni,ingenioustechie/zamboni,luckylavish/zamboni,tsl143/zamboni,diox/zamboni,clouserw/zamboni,ddurst/zamboni,eviljeff/zamboni,ingenioustechie/zamboni,kumar303/zamboni,tsl143/zamboni,diox/zamboni,washort/zamboni,shahbaz17/zamboni,jamesthechamp/zamboni,mudithkr/zamboni,shahbaz17/zamboni,mozilla/zamboni,eviljeff/zamboni,tsl143/zamboni,andymckay/zamboni,elysium001/zamboni,mozilla/zamboni,ngokevin/zamboni,ngokevin/zamboni,luckylavish/zamboni,Hitechverma/zamboni,mudithkr/zamboni,Hitechverma/zamboni,jasonthomas/zamboni,ayushagrawal288/zamboni,Jobava/zamboni,elysium001/zamboni,luckylavish/zamboni,elysium001/zamboni,elysium001/zamboni,washort/zamboni,ddurst/zamboni,mstriemer/zamboni,jamesthechamp/zamboni,mstriemer/zamboni,kumar303/zamboni,clouserw/zamboni,ayushagrawal288/zamboni