MB-5904 remove passwords from xdc status logging

Change-Id: I5a02b6c8a841176cb837dc6e1f01559b7a82e24f
Reviewed-on: http://review.couchbase.org/28277
Tested-by: Artem Stemkovski <artem@couchbase.com>
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>