MB-100: updated bucket workers bucket restart warning

As suggested by Dipti

Change-Id: I6cd9ddf0a9ae7c3a2e624ac134defe8adf761164
Reviewed-on: http://review.couchbase.org/26961
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>