Comment out upr notifier test

This test fails sporadically due to an engine_testapp issue. In order
to allow our automated jobs to continue without sporadic failures lets
just comment it out for now. There is a bug filed to fix the testing
issue and re-enable the test.

Change-Id: I02fde97f1893a3be86aafffb63edf148d111bd6b
Reviewed-on: http://review.couchbase.org/35465
Reviewed-by: David Liao <david.liao@couchbase.com>
Tested-by: Michael Wiederhold <mike@couchbase.com>