CBQE-1396: script to compare criteria per phase

Change-Id: I1875a3f7485261a65febee7f4e590a3ab30a8942
Reviewed-on: http://review.couchbase.org/27486
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Chisheng Hong <chisheng@couchbase.com>