MT refactor test_jobs

[Giuseppe Vallarelli]

[et=3]
[at=4]
In test_job there are some function that depend on two external objects: context, workflow, as well as ugly test_parameters_X_job. The aim of the refactoring is to:

1. Get rid of these dependencies by storing tests input data in external files, so each test function depend only on the called job code.

2. Refactor test_parameters using mock library an example of refactoring for tests_parameters_gardner_knopoff could be:

def test_parameters_gardner(self):
        context = create_context('config_gardner_knopoff.yml')
        context.working_catalog = []

        mocked_func = Mock(return_value=([], [], []))
        context.map_sc['gardner_knopoff'] = mocked_func

        gardner_knopoff(context)

        self.assertTrue(mocked_func.called)
        mocked_func.assert_called_with([], 'GardnerKnopoff', 0.5)