Refactor unit tests to reflect changes in exceptions when bootstrap fails

Change-Id: I387aa3c8a0d8954102265e27dbbe4f6d84c4d104
Reviewed-on: http://review.couchbase.org/41388
Tested-by: Jeffry Morris <jeffrymorris@gmail.com>
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Reviewed-by: Brett Lawson <brett19@gmail.com>