[Breaking Change] Cleanup Lutron light component (#18650)

Remove the return value from setup_platform
Convert LutronLight.__init__ to use super() when referencing the parent class.
Change device_state_attributes() to use lowercase snakecase (Rename 'Lutron Integration ID' to 'lutron_integration_id')

homeassistant/components/light/lutron.py

@@ -24,7 +24,6 @@ def setup_platform(hass, config, add_entities, discovery_info=None):
         devs.append(dev)
 
     add_entities(devs, True)
-    return True
 
 
 def to_lutron_level(level):
@@ -43,7 +42,7 @@ class LutronLight(LutronDevice, Light):
     def __init__(self, area_name, lutron_device, controller):
         """Initialize the light."""
         self._prev_brightness = None
-        LutronDevice.__init__(self, area_name, lutron_device, controller)
+        super().__init__(self, area_name, lutron_device, controller)
 
     @property
     def supported_features(self):
@@ -77,7 +76,7 @@ def turn_off(self, **kwargs):
     def device_state_attributes(self):
         """Return the state attributes."""
         attr = {}
-        attr['Lutron Integration ID'] = self._lutron_device.id
+        attr['lutron_integration_id'] = self._lutron_device.id
         return attr
 
     @property