ISPN-3417 Threads which get parked in CHMv8 won't ever be unparked
ISPN-3405 Cache stores hashing keys should use configured Equivalence

* Removed Bucket externalizer since it complicated injection of
per-cache equivalence function.
* Created EquivalentLinkedHashMap for the single file cache store
to be able to locate keys requiring Equivalence function in memory.
ISPN-2013 Using explicit "unlock" causes TimeoutException for other Threads
ISPN-3434 DistTotalOrderL1WriteSkewTest test doesn't run with L1 enabled
ISPN-2913 putForExternalRead leaves locks
ISPN-3357 Fix the OutdatedTopologyException check during remote invocation

I made some mistakes when rebasing from 5.2.x to master.
ISPN-755 Build JavaDocs from scala sources too
ISPN-3359 Add JavaDoc 7 stylesheet to fix documentation appearance
ISPN-3435 Enable tests for RemoteCache.getBulk() and keySet()
ISPN-3442 fix and tests added for Query API DSL