Add output of variables to AgentRingNoAnswer manager

event if eventwhencalled is set to "vars" in 
queues.conf. Yay for consistency.

(closes issue #13369)
Reported by: srt
Patches:
      13369_agentringnoanswer_variables.diff uploaded by srt (license 378)



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@139832 65c4cc65-6c06-0410-ace0-fbb531ad65f3