cleaning up initialize()

- standardisded on a single context argument
- removed Device.init() no longer necessary as initilize now
  automatically gets propagated up the hierarchy. Renamed the existing
  use of it to "initilize".
- related pylint cleanup.

wlauto/core/instrumentation.py

@@ -385,10 +385,10 @@ class Instrument(Extension):
         self.is_enabled = True
         self.is_broken = False
 
-    def initialize(self, context):  # pylint: disable=arguments-differ
+    def initialize(self, context):
         pass
 
-    def finalize(self, context):  # pylint: disable=arguments-differ
+    def finalize(self, context):
         pass
 
     def __str__(self):