Adjust MUC implementation to recent changes in Tigase Kernel
I adjusted MUC to Tigase Kernel Framework. Need to update Tigase ACS MUC to new TCF before I can mark it as completed.
MUC implementation is updated and MUC-ACS as well. Both checked and work fine with newest build of Tigase XMPP Server 7.2.0
Adjust MUC implementation to recent changes in Tigase Kernel