Generate Legacy UUIDs using IntegrationIDs and other information. (#90)

* Add support for generating UUIDs with older firmware.

Much older Lutron firmware doesn't have UUIDs.  We generate legacy UUIDs using the integration IDs and component numbers.  These are accessible via the legacy_uuid property and should work for all versions of firmware.

Note: Integration ids can/do change when significant changes are made to the programming of a system which is why UUIDs exist in the first place.

pylutron/__init__.py

@@ -622,6 +622,11 @@ def name(self):
   def uuid(self):
     return self._uuid
 
+  @property
+  def legacy_uuid(self):
+    """Return a synthesized uuid."""
+    return None
+
   def _dispatch_event(self, event: LutronEvent, params: Dict):
     """Dispatches the specified event to all the subscribers."""
     for handler, context in self._subscribers:
@@ -693,6 +698,10 @@ def id(self):
     """The integration id"""
     return self._integration_id
 
+  @property
+  def legacy_uuid(self):
+    return '%d-0' % self.id
+
   def handle_update(self, args):
     """Handles an event update for this object, e.g. dimmer level change."""
     _LOGGER.debug("handle_update %d -- %s" % (self._integration_id, args))
@@ -816,6 +825,10 @@ def component_number(self):
     is only used for interfacing with the controller."""
     return self._component_num
 
+  @property
+  def legacy_uuid(self):
+    return '%d-%d' % (self._keypad.id, self._component_num)
+
   def handle_update(self, action, params):
     """Handle the specified action on this component."""
     _LOGGER.debug('Keypad: "%s" Handling "%s" Action: %s Params: %s"' % (
@@ -1018,6 +1031,10 @@ def id(self):
     """The integration id"""
     return self._integration_id
 
+  @property
+  def legacy_uuid(self):
+    return '%d-0' % self.id
+
   @property
   def name(self):
     """Returns the name of this keypad"""
@@ -1114,6 +1131,10 @@ def id(self):
     """The integration id"""
     return self._integration_id
 
+  @property
+  def legacy_uuid(self):
+    return str(self.id)
+
   def __str__(self):
     """Returns a pretty-printed string for this object."""
     return 'MotionSensor {} Id: {} Battery: {} Power: {}'.format(
@@ -1211,6 +1232,10 @@ def id(self):
     """The integration id"""
     return self._integration_id
 
+  @property
+  def legacy_uuid(self):
+    return '%s-%s' % (self._area.id, self._group_number)
+
   @property
   def group_number(self):
     """The OccupancyGroupNumber"""