Disable color during running test

(closes issue #18776)
Reported by: alecdavis
Patches:
     ast_deb_init.diff uploaded by lathama (license 1028)
Tested by: andrel, lathama


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@307315 65c4cc65-6c06-0410-ace0-fbb531ad65f3