Mods to MUC service to allow for setting a delegate and adding extra features/changing identity.  Also, CS manager now sets up/configures muc service with delegate.  Delegate itself still needs work.

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@10119 b35dd754-fafc-0310-a699-88a17e54d16e