🚑 fix check for bucket name when using config
🚑 fix check for bucket name when using config

Change-Id: Ifae227402def7bf6ba9d74cfb442375af7a0512e
Reviewed-on: http://review.couchbase.org/c/couchbase-ruby-client/+/129000
Tested-by: Sergey Avseyev <87f6d5e4fd3644c3c20800cde7fd3ad1569370b3@gmail.com>
Reviewed-by: Sergey Avseyev <87f6d5e4fd3644c3c20800cde7fd3ad1569370b3@gmail.com>

couchbase/couchbase-ruby-client,couchbase/couchbase-ruby-client,couchbase/couchbase-ruby-client