Move handling of migration event source to solve bootstrap race.
Patch by Sergio Bossa and brandonwilliams, reviewed by Tyler Hobbs for
CASSANDRA-6648
Make sure compaction throughput values doesn't overflow because of int math
patch by pvai reviewed by dbrosius for cassandra-6647
Update news, version in preparation for 1.2.15
Remove/update invalid sentences in CQL doc
Fix partition and range deletes not triggering flush

patch by benedict; reviewed by slebresne for CASSANDRA-6655
Fix upgradesstables NPE for non-CF-based indexes
patch by Sergio Bossa; reviewed by jbellis for CASSANDRA-6645
Fix unwanted schema pull while upgrading nodes from 1.2 to 2.0
Patch by Sergio Bossa, reviewed by brandonwilliams for CASSANDRA-6678
Fix mean cells and mean row size per sstable calculations
patch by Paulo Gaspar, jbellis, and Marcus Eriksson for CASSANDRA-6667
Compact hints after partial replay to clean out tombstones
patch by jbellis; reviewed by ayeschenko for CASSANDRA-6666
fix race in LeaveAndBootstrapTest
add target to run specific test methods
Clean up Memtable.resolve()
Partially revert MM.isReadyForBootstrap change from 6648
Patch by brandonwilliams, reviewed by Richard Low for CASSANDRA-6685
Fix CleanupTest

patch by marcuse, reviewed by jbellis for CASSANDRA-6679
Log USING TTL/TIMESTAMP in a counter update warning

patch by Aleksey Yeschenko; reviewed by Sylvain Lebresne for
CASSANDRA-6649
Sleep for RING_DELAY before replacing with same IP
Patch by brandonwilliams reviewed by Tyler Hobbs for CASSANDRA-6622
Don't exchange schema between nodes with different versions

patch by Aleksey Yeschenko; reviewed by Piotr Kołaczkowski for
CASSANDRA-6695
Use real node messaging versions for schema exchange decisions

patch by Aleksey Yeschenko; reviewed by Piotr Kołaczkowski for
CASSANDRA-6700
IN on the last clustering columns + ORDER BY DESC yield no results

patch by slebresne; reviewed by thobbs for CASSANDRA-6701
Fix SecondaryIndexManager#deleteFromIndexes()

patch by Sergio Bossa; reviewed by Sam Tunnicliffe for CASSANDRA-6711