Fix NPE in pig with tables created from thrift
Patch by Alex Liu, reviewed by brandonwilliams for CASSANDRA-6072
Merge branch 'cassandra-1.2' into cassandra-2.0
Change runtime exceptions to IOE in pig
Patch by Alex Liu, reviewed by brandonwilliams for CASSANDRA-6099
Merge branch 'cassandra-1.2' into cassandra-2.0