Code review comment for lp:~javier.collado/utah/bug1042895

Finally, is the prerm script necessary? Shouldn't package removal take care of that file? If we do need that prerm, is there a reason we need it only for the jsonschema deb and not for the utah-client deb?

I like the rest of it. Let me know what you think about those points, and we can get those tests working again.