Move the apptest runner and parts of mopy to the public SDK.

mojo/tools/run_mojo_python_tests.py

 #!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import os
 import sys
 
-from mopy.mojo_python_tests_runner import MojoPythonTestRunner
+from mopy_internal.mojo_python_tests_runner import MojoPythonTestRunner
 
 
 def main():
   test_dir_list = [
     # Tests of pylib bindings.
     os.path.join('mojo', 'public', 'tools', 'bindings', 'pylib'),
     # Tests of "mopy" python tools code.
-    os.path.join('mojo', 'tools', 'mopy')
+    os.path.join('mojo', 'public', 'tools', 'mopy')
   ]
 
   for test_dir in test_dir_list:
     runner = MojoPythonTestRunner(test_dir)
     exit_code = runner.run()
     if exit_code:
       return exit_code
 
 
 if __name__ == '__main__':
   sys.exit(main())