AsyncAGI should not close the manager session on error.

(closes issue #12370)
 Reported by: srt
 Patches: 
       asterisk-12370.diff uploaded by srt (license 378)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@112972 65c4cc65-6c06-0410-ace0-fbb531ad65f3