Avoid test to write in disk if machine-id is not found (#3543)

Signed-off-by: ahitacat <[email protected]>

insights/tests/client/apps/test_malware_detection.py

@@ -123,6 +123,7 @@ def test_default_options(self):
     @patch(GET_RULES_TARGET, return_value=TEST_RULE_FILE)
     @patch(FIND_YARA_TARGET, return_value=YARA)
     @patch(LOGGER_TARGET)
+    @patch('insights.client.utilities.write_to_disk', Mock())
     def test_running_default_options(self, log_mock, yara, rules, cmd, create_test_files):
         # Try running malware-detection with the default options
         # With the default options, test_scan is true, so some of the option values will be changed for that and