[loader] Make recipe engine support examples/ module subdir

recipe_modules/python/example.py

-# Copyright 2015 The LUCI Authors. All rights reserved.
-# Use of this source code is governed under the Apache License, Version 2.0
-# that can be found in the LICENSE file.
-
-"""Launches the repo bundler."""
-
-DEPS = [
-  'path',
-  'python',
-  'raw_io',
-  'step',
-]
-
-
-def RunSteps(api):
-  api.python.succeeding_step("success", ["This step is a success"],
-                             as_log='success')
-
-  # Test that a failing step raises StepFailure.
-  was_failure = False
-  try:
-    api.python.failing_step("failure", "This step is a failure :(")
-  except api.step.StepFailure:
-    was_failure = True
-  assert was_failure
-
-  # Test that unbufferred actually removes PYTHONUNBUFFERED envvar.
-  api.python('run json.tool', '-m', [
-    'json.tool', api.raw_io.input('{"something":[true,true]}'),
-  ], unbuffered=False)
-
-  api.python.inline('inline', 'print "Hello World!"')
-
-  # Test "vpython"-based invocation.
-  #
-  # The "test.py" script has an inline VirtualEnv spec that is read by default
-  # when "vpython" is invoked.
-  #
-  # The second invocation uses an explicit spec with a different package set to
-  # verify that the explicit spec is laoded instead of the inline spec.
-  api.python('run vpython.inlinespec', api.resource('test.py'),
-             args=['--verify-enum34'], venv=True)
-  api.python('run vpython.spec', api.resource('test.py'),
-             args=['--verify-six'], venv=api.resource('test.vpython'))
-
-
-def GenTests(api):
-  yield api.test('basic')