Fix bug in ResourceHandle age preference

- Older handles should be preferred, recent change flipped the logic

operator/resourcehandle.py

@@ -68,7 +68,7 @@ def __lt__(self, cmp):
             return False
 
         # Prefer older matches
-        return self.resource_handle.creation_timestamp < cmp.resource_handle.creation_timestamp
+        return self.resource_handle.creation_timestamp > cmp.resource_handle.creation_timestamp
 
 class ResourceHandle(KopfObject):
     api_group = Poolboy.operator_domain