message: Getting rid of create_resource and initialize methods.
diff: @@ -165,18 +165,10 @@ class TrackableResource(base.Trackable):
  raise NotImplementedError("TrackableResource._create_resource not "
  "implemented.")
  - # This method will be removed soon.
  - def create_resource(self):
  - return self._create_resource()
  -
  def _initialize(self):
  """A function that initializes the resource. Optional."""
  pass
  - # This method will be removed soon.
  - def initialize(self):
  - return self._initialize()
  -
  @property
  def resource_handle(self):
  """Returns the resource handle associated with this Resource."""
  