MB-12750 parameter to enable goxdcr

Change-Id: Ieb4ff2b3990b84b3fcf7951444dc3745791740f5
Reviewed-on: http://review.couchbase.org/44159
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
MB-12750 config parameter for goxdcr rest port

Change-Id: I40730d527468524c46601f3a0c9e8bb064711036
Reviewed-on: http://review.couchbase.org/44160
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>