CCBC-396: Allow easier test runs against a real server

- Add the '-C' option to check-all to specify a real cluster
- Remove some extraneous printf statements shown when using a real
  cluster

Change-Id: Ie20415bd51eb075aa4e7ed2e3a980c99b97e1414
Reviewed-on: http://review.couchbase.org/36415
Reviewed-by: Brett Lawson <brett19@gmail.com>
Tested-by: Mark Nunberg <mnunberg@haskalah.org>