Move load_save_test.py from caffe2/python/ to caffe2/python/operator_test/

Summary: Move load_save_test.py from caffe2/python to caffe2/python/operator_test/

Reviewed By: boryiingsu

Differential Revision: D6657724

fbshipit-source-id: 030942316444ec93c3bc2970902d7b3980e60cfc
diff --git a/caffe2/python/load_save_test.py b/caffe2/python/operator_test/load_save_test.py
similarity index 100%
rename from caffe2/python/load_save_test.py
rename to caffe2/python/operator_test/load_save_test.py