Disable SSLv3 for POODLE

patch by Jeremiah Jordan; reviewed by jasobrown for CASSANDRA-8265
Merge branch 'cassandra-2.0' into cassandra-2.1

Conflicts:
	CHANGES.txt
	src/java/org/apache/cassandra/transport/Server.java
	src/java/org/apache/cassandra/transport/SimpleClient.java
ninja-fix nit from casandra-8265 commit (make repeated strings a constant)
Merge branch 'cassandra-2.0' into cassandra-2.1

Conflicts:
	src/java/org/apache/cassandra/thrift/CustomTThreadPoolServer.java
	src/java/org/apache/cassandra/transport/Server.java
	src/java/org/apache/cassandra/transport/SimpleClient.java