Some refactoring.
*Â bzrlib/tests/test_foreign.py:
(register_dummy_foreign_for_test): Factored out now that we have 3
uses.
(DummyForeignVcsTests): Use register_dummy_foreign_for_test.
*Â bzrlib/tests/blackbox/test_dpush.py:
(TestDpush, TestDpushStrictMixin): Use register_dummy_foreign_for_test.