tests: Remove old-style test runner module

tests: Remove old-style test runner module

We get the following warning on django 1.7:

System check identified some issues:

WARNINGS:
?: (1_6.W001) Some project unittests may not execute as expected.
	HINT: Django 1.6 introduced a new default test runner. It looks like this project was generated using Django 1.5 or earlier. You should ensure your tests are all running & behaving as expected. See https://docs.djangoproject.com/en/dev/releases/1.6/#new-test-runner for more information.

This change removes the unneeded base test module, and moves the
patchparser doctests into a proper test module.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>