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
Merge branch 'trunk' into 7395