Fix unwanted schema pull while upgrading nodes from 1.2 to 2.0
Patch by Sergio Bossa, reviewed by brandonwilliams for CASSANDRA-6678
Merge branch 'cassandra-1.2' into cassandra-2.0
Fix unwanted schema pull while upgrading nodes from 1.2 to 2.0
Patch by Sergio Bossa, reviewed by brandonwilliams for CASSANDRA-6678