CCBC-332: Use revids when comparing configs

Change-Id: I4df5a5e40f6b7765d3842f072a48427561f05f48
Reviewed-on: http://review.couchbase.org/36302
Reviewed-by: Brett Lawson <brett19@gmail.com>
Tested-by: Mark Nunberg <mnunberg@haskalah.org>