'Filter all tests without uuid in metadata'

def find_untagged(self, tests):

    def check_uuid_in_meta(module_name, test_name, tests):
        idempotent_id = self._get_idempotent_id(tests[module_name]['tests'][test_name])
        return (not idempotent_id)
    return self._filter_tests(check_uuid_in_meta, tests)
