Dataflow python quest 2_Branching_Pipelines - Missing temp_location and staging_location arguments

The arguments temp_location and staging_location arguments are missing in [1].

We should add these following lines:

#line 31
parser.add_argument('--tempLocation', required=True, help='Specify Cloud Storage bucket for temp')
parser.add_argument('--stagingLocation', required=True, help='Specify Cloud Storage bucket for staging')

#line 40
options.view_as(GoogleCloudOptions).staging_location = opts.stagingLocation
options.view_as(GoogleCloudOptions).temp_location = opts.tempLocation

[1] https://github.com/GoogleCloudPlatform/training-data-analyst/blob/master/quests/dataflow_python/2_Branching_Pipelines/solution/my_pipeline.py