tests module should import test cases

init loads all python files in the tests directory, imports them as
modules and finds all TestCase subclasses and runs them.

Had to disable the one existing test; it assumes that there is already
data in the database; we'll need to rewrite this test slightly.
test that the server responds to AHJ urls correctly

This is both a unit test that adds a jurisdiction to the test database
and queries the server (to ensure that it is working in general), and
a management command that queries the production database in the same
manner (to ensure that it's oworking for those urls specifically).
Merge pull request #9 from solarpermit/ahj-url-tests

AHJ url tests