Add participant removed event to the main DB without updating the DB content
Try to terminate event only if it not NULL in subscribe_loosing_dialog_2
Fix test "Call accepted while callee is updating another one"
Preempt sound resources only if media_resources_mode is set to unique. It fixes test "2 Video call accepted in send only" because the core receiving the calls is used in server mode
Bring back LeaksMemory tag to test "Group chat room subscription denied". Leaks are caused by network up and down
Destroy cores if calls are not received in push incoming call suite