Versions update for 1.2.18
Use unsafe mutations where possible in unit tests

Patch by Lyuben Todorov; reviewed by Tyler Hobbs for CASSANDRA-6969
Fix race condition during pending range calculation

Patch by Josh McKenzie; reviewed by Tyler Hobbs for CASSANDRA-7390
Fail to start if commit log replay encounters an exception

patch by Benedict; reviewed by Vijay
Merge branch 'cassandra-2.1' into trunk

Conflicts:
	test/unit/org/apache/cassandra/db/CommitLogTest.java
fix jamm ver in debian
Merge branch 'cassandra-2.1.0' into cassandra-2.1
Merge branch 'cassandra-2.1' into trunk
Warn when SSL certs have expired.

Patch by brandonwilliams, reviewed by jasobrown for CASSANDRA-7528
Merge branch 'cassandra-2.0' into cassandra-2.1.0

Conflicts:
	CHANGES.txt
Merge branch 'cassandra-2.1.0' into cassandra-2.1
Merge branch 'cassandra-2.1' into trunk
Set stream ID on response for non-Exception Throwables

Patch by Tyler Hobbs; reviewed by Aleksey Yeschenko for CASSANDRA-7470
Merge branch 'cassandra-1.2' into cassandra-2.0

Conflicts:
	CHANGES.txt
	NEWS.txt
	build.xml
	debian/changelog
Merge branch 'cassandra-2.0' into cassandra-2.1.0

Conflicts:
	CHANGES.txt
Merge branch 'cassandra-2.1.0' into cassandra-2.1
Merge branch 'cassandra-2.1' into trunk
Make cql3 word count executable
Merge branch 'cassandra-2.0' into cassandra-2.1
Merge branch 'cassandra-2.1' into trunk