Pin erlang version (#2067)
Pin erlang version (#2067)

Latest erlang breaks rabbitmq-server output,
https://github.com/rabbitmq/rabbitmq-management/issues/244

Change-Id: Iad80d55fc549a840e43d73057f3623ce0a8e4868
pgraziano/ursula,masteinhauser/ursula,panxia6679/ursula,wupeiran/ursula,narengan/ursula,ddaskal/ursula,narengan/ursula,edtubillara/ursula,nirajdp76/ursula,panxia6679/ursula,lihkin213/ursula,fancyhe/ursula,nirajdp76/ursula,twaldrop/ursula,fancyhe/ursula,knandya/ursula,edtubillara/ursula,ddaskal/ursula,zrs233/ursula,wupeiran/ursula,twaldrop/ursula,zrs233/ursula,zrs233/ursula,narengan/ursula,nirajdp76/ursula,panxia6679/ursula,lihkin213/ursula,channus/ursula,blueboxgroup/ursula,narengan/ursula,pgraziano/ursula,fancyhe/ursula,masteinhauser/ursula,channus/ursula,channus/ursula,lihkin213/ursula,zrs233/ursula,channus/ursula,pgraziano/ursula,edtubillara/ursula,masteinhauser/ursula,blueboxgroup/ursula,edtubillara/ursula,rongzhus/ursula,masteinhauser/ursula,lihkin213/ursula,wupeiran/ursula,rongzhus/ursula,twaldrop/ursula,wupeiran/ursula,rongzhus/ursula,knandya/ursula,knandya/ursula,knandya/ursula,blueboxgroup/ursula,rongzhus/ursula,blueboxgroup/ursula,ddaskal/ursula,twaldrop/ursula,panxia6679/ursula,ddaskal/ursula,fancyhe/ursula,pgraziano/ursula,nirajdp76/ursula