Move the CLI commands that were in builtins[] into the cli_cli[] array of CLI

commands and remove the cli_iterator struct.  This gets tab completion working
again.

(closes issue #10970)
Reported by: jamesgolovich
Patches: 
      asterisk-clicomplete.diff.txt uploaded by jamesgolovich (license 176)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@85550 65c4cc65-6c06-0410-ace0-fbb531ad65f3