Like predicate UDFs.

Change-Id: Iefcd304482c7ea8dc3be10d18fbb7e5d1f73d6c2
Reviewed-on: http://gerrit.sjc.cloudera.com:8080/3633
Reviewed-by: Paden Tomasello <paden.tomasello@cloudera.com>
Tested-by: jenkins
Reviewed-on: http://gerrit.sjc.cloudera.com:8080/3761