homeassistant: Enable app properly on first install

- When app is installed for the first time, the drop-in configuration file
/etc/apache2/includes/home-assistant-freedombox.conf is not created properly.
This is because app.enable() is not being called and not all components are
enabled (including the drop-in configuration component). Fix this by calling
app.enable() in setup().

- Ensure that apache2 is restarted after the homeassistant app is update to
version 2 from version 1.

Tests:

- On a fresh VM, without the patch, installing HA does not result in working HA
UI. With patch, on a fresh VM. It works.

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>

freedombox/modules/homeassistant/__init__.py

@@ -97,7 +97,8 @@ class HomeAssistnatApp(app_module.App):
         self.add(firewall_local_protection)
 
         webserver = WebserverRoot('webserverroot-homeassistant',
-                                  'home-assistant-freedombox')
+                                  'home-assistant-freedombox',
+                                  last_updated_version=2)
         self.add(webserver)
 
         image_name = 'registry.freedombox.org/' \
@@ -138,3 +139,6 @@ class HomeAssistnatApp(app_module.App):
         super().setup(old_version)
 
         privileged.setup(old_version)
+
+        if not old_version:
+            self.enable()