Fix failing pig test

Patch by Alex Liu, reviewed by brandonwilliams for CASSANDRA-6376
Update copyright date in NOTICE file
Add extra SSL cipher suites.

Patch by brandonwilliams, reviewed by Ray Sinnema for CASSANDRA-6613
Extend limits.conf in debian packaging.

Patch by brandonwilliams for CASSANDRA-6104
Add UNLOGGED, COUNTER options to BATCH docs

patch by Tyler Hobbs; reviewed by Sylvain Lebresne for CASSANDRA-6816
comment CqlRow for #6807
nodetool status should issue a warning when no keyspace is specified
patch by Vijay; reviewed by Brandon Williams for CASSANDRA-6168
status output is confused when hostname resolution is enabled
patch by Vijay; reviewed by Brandon Williams for CASSANDRA-6896
Fix SSTable not released if stream fails before it starts

patch by yukim; reviewed by Richard Low for CASSANDRA-6818
Fix typo in DeletionInfo
Update versions and NEWS for 1.2.16 release
Fix batchlogManager#deleteBatch() use of millisecond timsestamps

patch by Aleksey Yeschenko; reviewed by Pavel Yaskevich for
CASSANDRA-6822
Add logging about not autobootstrapping a seed.

Patch by brandonwilliams for CASSANDRA-6972
Fix LatencyMetrics returning infinity.

Patch by Nick Bailey, reviewed by Lyuben Todorov for CASSANDRA-6920
Add forgotten test
Continue with assassinate even if the endpoint vanishes during the
sleep-for-safety check.

Patch by brandonwilliams, reviewed by Jeremiah Jordan for CASSANDRA-6787
if relocate is a no-op, don't try to op.