Update comment explaining why configs is not present at the repositor…

…y level.

leapp/repository/__init__.py

@@ -190,7 +190,15 @@ def mapped_actor_data(data):
             })
             return data
 
-        # TODO: Do we need to add configs here as well?
+        # Note: `configs` are not present here because we are not yet making
+        # them globally accessible.  This is to force people to copy the config
+        # schema to their Actors instead of importing them from other Actors.
+        # That copy, in turn, is a good idea so the framework can return an
+        # error if two Actors share the same config but they have different
+        # schemafor it (for instance, if Actor Foo and Bar were sharing the
+        # same config entry but Actor Foo updated the entry in a later version.
+        # We need to error so Actor Bar can either be ported to the new
+        # definition or use a different config entry for it's needs.)
         return {
             'repo_dir': self._repo_dir,
             'actors': [mapped_actor_data(a.serialize()) for a in self.actors],