ISPN-2715 - org.infinispan.distexec.mapreduce.TopologyAwareTwoNodesMapReduceTest.testCombinerDoesNotChangeResult test fails randomly
ISPN-2581 Create unit test for state transfer completion

* Proove that config option StateTransferConfiguration.awaitInitialTransfer()
is honored correctly.
* Removed dead code.
* Log exceptions encountered during command execution as errors
ISPN-2670 Test Hot Rod client now supports protocol version 1.2
ISPN-2755 Filter the table prefix for inappropriate characters
ISPN-2754 Fix the infinispan-config-5.2.xsd schema to allow multiple "external" stores (i.e. declared in other schemas)
ISPN-2723 Skip locality check for preload tx implied operations
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