GOCBC-532: Add ServiceNotConfigured error helper
GOCBC-532: Add ServiceNotConfigured error helper

Change-Id: I2121431569840f04a40e33b0e4054e5f9b56fc33
Reviewed-on: http://review.couchbase.org/113503
Reviewed-by: Brett Lawson <c8c4369773d7d7226e031f0c4af62e3f38a08510@gmail.com>
Tested-by: Charles Dixon <e13bf4498b4994e133fd3586350658dc4a59329a@gmail.com>

brett19/gocb