pass uuid to Metadata.pm

to avoid "Need UUID or existing metadata file!" at Metadata.pm line 56
I offer http://www.martinfowler.com/articles/nonDeterminism.html as a argument against intentionally introducing non-deterministic tests.  The author also offers some alternatives to different kinds of non-deterministic tests, including tests which would access remote services.  I find ideas like the "Integration Contract Test" and "Self Initializing Fake" appealing for cases such as this.