SPN-2647 ReplaceCommand does not perform any modifications if the entry ...

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FOR REVIEW
Fix 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

Jira: https://issues.jboss.org/browse/ISPN-2647