Fix test_partition_metadata to run against Isilon.
Fix test_partition_metadata to run against Isilon.

A compatibility test was added to test_partition_metadata which runs queries against Hive
and Impala. Since we don't start Hive when the filesystem is Isilon, skip the test.

Change-Id: Ia69939a74d1655483473d1b0686120ac29815c3d
Reviewed-on: http://gerrit.cloudera.org:8080/585
Reviewed-by: Dan Hecht <20ebd99959f0f6e5dcb0fc319b4d8ef53a16b5fb@cloudera.com>
Tested-by: Internal Jenkins

cloudera/recordservice,cloudera/recordservice,cloudera/recordservice,cloudera/recordservice,cloudera/recordservice,cloudera/recordservice,cloudera/recordservice