RESOLVED - issue KAZOO-1984: MOH on ring groups 
https://2600hz.atlassian.net/browse/KAZOO-1984
 answer call before bridge so caller is not hungup
RESOLVED - issue KAZOO-1984: MOH on ring groups 
https://2600hz.atlassian.net/browse/KAZOO-1984

handle special variable name ringback and transfer_ringback when sending
to FreeSWITCH
Merge pull request #225 from 2600hz/KAZOO-1984

Kazoo 1984