Remove the assert from DataTracker.unsubscribe()
Fix ABSC reverse iterator's remove() method

patch by Mikhail Stepura; reviewed by Aleksey Yeschenko for
CASSANDRA-6629
Backport 6190
add cassandra.default_messaging_version
patch by Minh Do; reviewed by jbellis for CASSANDRA-6619
Handle host id conflicts properly.
Patch by brandonwilliams, reviewed by Tyler Hobbs for CASSANDRA-6615
revert CASSANDRA-6107, and cut max cached statements to 50k
sstables from stalled repair sessions become live after a reboot and can resurrect deleted data
patch by jasobrown, reviewed by yukim for CASSANDRA-6503
Update versions and licenses for 1.2.14 release
Improve CQL3 documentation section on COMPACT STORAGE (CASSANDRA-6642)
Fix typo in changelog
ocd
fix fat client tests
unify test timeouts, exclude pig
exclude pig from test target
Unscarify 6510 CHANGES