Delete empty mojo python package, and prefix all python packages with mojo_

mojo/python/tests/generation_unittest.py

 # 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 mojo_unittest
-from mojo.bindings import reflection
+from mojo_bindings import reflection
 
 
 class GenerationTest(mojo_unittest.MojoTestCase):
 
   TEST_PACKAGES = [
     'math_calculator_mojom',
     'no_module_mojom',
     'rect_mojom',
     'regression_tests_mojom',
     'sample_factory_mojom',
     'sample_import2_mojom',
     'sample_import_mojom',
     'sample_interfaces_mojom',
     'sample_service_mojom',
     'serialization_test_structs_mojom',
     'test_structs_mojom',
     'validation_test_interfaces_mojom',
   ]
 
   @staticmethod
   def testGeneration():
     buildable_types = (reflection.MojoStructType, reflection.MojoInterfaceType)
     for module_name in GenerationTest.TEST_PACKAGES:
       module = __import__(module_name)
       for element_name in dir(module):
         element = getattr(module, element_name)
         if isinstance(element, buildable_types):
           # Check struct and interface are buildable
           element()