MB-12564: changed bucket_info_cache to get services from config

Change-Id: Ia37b8ae2056a7f8f1b560919f66bf3cf2a81dc86
Reviewed-on: http://review.couchbase.org/42869
Reviewed-by: Artem Stemkovski <artem@couchbase.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>