ISPN-2664 Cleanup caches after each method to avoid non-empty caches
ISPN-2647 ReplaceCommand does not perform any modifications if the entry was not yet transfered during rehashing

Fixes distributed case only. The replicated case still fails, so the test is still disabled.

* Add more trace logging
* Extend consistency tests to also cover putIfAbsent
* TxDistributionInterceptor will do a remoteGetBeforeWrite() if the command is conditional
ISPN-2741 Conditional operation test should be set to sync commit true
ISPN-2759 Don't throw an NPE when invoking operations via the RHQ plugin