MB-11664: node recovery functionality is only for admin

Change-Id: Iaf027d12b87db058f96ff2b7d43cab7b9fe03556
Reviewed-on: http://review.couchbase.org/39410
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>