'Cleanup resources in case of test-failure
Some resources are explicitly deleted by the test.
If the test failed to delete a resource, this method will execute
the appropriate delete methods. Otherwise, the method ignores NotFound
exceptions thrown for resources that were correctly deleted by the
test.
:param delete_callable: delete method
:param args: arguments for delete method
:param kwargs: keyword arguments for delete method'

@classmethod
def _try_delete_resource(cls, delete_callable, *args, **kwargs):

    try:
        delete_callable(*args, **kwargs)
    except lib_exc.NotFound:
        pass
