Remove shuffle/taketoken

Patch by brandonwilliams, reviewed by thobbs for CASSANDRA-7601
Merge branch 'cassandra-1.2' into cassandra-2.0
Merge branch 'cassandra-2.0' into cassandra-2.1.0
Merge branch 'cassandra-2.1.0' into cassandra-2.1
Merge branch 'cassandra-2.1' into trunk