MB-11696: show general errors in appropriate tag

Change-Id: I686b045c3eac2576e7a082c003cb9c422cef483a
Reviewed-on: http://review.couchbase.org/39492
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>