[Cloud Tasks] Add task with authentication sample [(#2113)](GoogleClo…

…udPlatform/python-docs-samples#2113)

* Add task with authentication sample

* Fix linting

* Fix linting

* Fix spacing

* Update tests with service account

* Move samples and update READMEs

* Update version and linting

samples/appengine/flexible/tasks/Dockerfile

@@ -0,0 +1,17 @@
+# Use the official Python image.
+# https://hub.docker.com/_/python
+FROM python:3.7
+
+# Copy local code to the container image.
+ENV APP_HOME /app
+WORKDIR $APP_HOME
+COPY . .
+
+# Install production dependencies.
+RUN pip install Flask gunicorn
+
+# Run the web service on container startup. Here we use the gunicorn
+# webserver, with one worker process and 8 threads.
+# For environments with multiple CPU cores, increase the number of workers
+# to be equal to the cores available.
+CMD exec gunicorn --bind :$PORT --workers 1 --threads 8 main:app

samples/appengine/flexible/tasks/README.md

@@ -101,24 +101,3 @@ endpoint, with a payload specified:
 ```
 python create_app_engine_queue_task.py --project=$PROJECT_ID --queue=$QUEUE_ID --location=$LOCATION_ID --payload=hello
 ```
-
-### Using HTTP Push Queues
-
-Set an environment variable for the endpoint to your task handler. This is an
-example url to send requests to the App Engine task handler:
-```
-export URL=https://<project_id>.appspot.com/example_task_handler
-```
-
-Running the sample will create a task and send the task to the specific URL
-endpoint, with a payload specified:
-
-```
-python create_http_task.py --project=$PROJECT_ID --queue=$QUEUE_ID --location=$LOCATION_ID --url=$URL --payload=hello
-```
-
-Now view that the payload was received and verify the payload:
-
-```
-gcloud app logs read
-```

samples/appengine/flexible/tasks/requirements.txt

@@ -1,3 +1,3 @@
 Flask==1.0.2
 gunicorn==19.9.0
-google-cloud-tasks==0.6.0
+google-cloud-tasks==0.7.0