MB-9745: added xdcr settings for supervisor restart frequency

Change-Id: I4a60e4bebaed069565a217f6919ad304a63298c8
Reviewed-on: http://review.couchbase.org/32281
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Tested-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>