Blocked revisions 373196

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Ensure that all ConfBridge sounds can be set using CONFBRIDGE function

The CONFBRIDGE function can be used to set the sounds in a ConfBridge
bridge profile.  Unfortunately, three sounds were missed in the portion
of the code that applies the settings passed in from the function:
sound_only_one, join, and leave.  This patch makes sure that the sounds
passed from the function are applied to the bridge profile.

(closes issue ASTERISK-20404)
Reported by: univ
Tested by: mjordan

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/11@373197 65c4cc65-6c06-0410-ace0-fbb531ad65f3