MT#9985 vhosts: enable MUC for domains

Change-Id: Ibbec8aabc14fbc2fd653f41bc7def692b3885478
MT#9985 vhosts: rework enable MUC for domains

dynamic components should be added in this way

Change-Id: I8cc89e5c0a741fd5d9b37afd051399997c9694c2