Convert some spaces to tabs and make it so the CLI command is only registered

once instead of 3 times.

(closes issue #11053)
Reported by: seanbright
Patches:
      app_playback.patch uploaded by seanbright (license 71)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@86835 65c4cc65-6c06-0410-ace0-fbb531ad65f3