Add initial Z-Wave config panel (#5937)

* Add Z-Wave config panel

* Add config to Z-Wave dependencies

* Lint

* lint

* Add tests

* Remove temp workaround

* Lint

* Fix tests

* Address comments

* Fix tests under Py34

tests/components/device_tracker/test_init.py

@@ -48,10 +48,8 @@ class TestComponentsDeviceTracker(unittest.TestCase):
     # pylint: disable=invalid-name
     def tearDown(self):
         """Stop everything that was started."""
-        try:
+        if os.path.isfile(self.yaml_devices):
             os.remove(self.yaml_devices)
-        except FileNotFoundError:
-            pass
 
         self.hass.stop()