ISPN-4519 Prepare should be broadcasted to entire cluster in replicated mode

Command should be sent to null even if not all caches are members
ISPN-4517 RollbackCommands should ignore leavers
ISPN-4484 fix caused unnecessary InterruptedExceptions

When state transfer is over, the response to the last StateResponseCommand
could reach the provider node after the CH_UPDATE from the coordinator.

If that happens, no data is lost, but the OutboundTransferTask thread is
interrupted and it logs the InterruptedException stack trace.
ISPN-4446 Use thread local to signal cache removal to components

* Since stop() takes no parameters, the only way to get correct
semantics of cache removal is to use a thread local variable.