Add test events necessary for bridge tests to pass in the test suite.

(closes issue AST-1200)
reported by John Bigelow
Review: https://reviewboard.asterisk.org/r/2790/



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@397593 65c4cc65-6c06-0410-ace0-fbb531ad65f3