Fix Tasks sample test issues.

…amples#1116)

Add required flag on certain arguments to command-line tools

…amples#1133)

* Auto-update dependencies.

* Fix missing http library

Change-Id: I99faa600f2f3f1f50f57694fc9835d7f35bda250

Update Task Queue samples for beta

…amples#1186)

…amples#1217)

…loudPlatform/python-docs-samples#1254)

…loudPlatform/python-docs-samples#1271)

…ogleCloudPlatform/python-docs-samples#1288)

…amples#1309)

…oudPlatform/python-docs-samples#1311)

…orm/python-docs-samples#1329)

…amples#1320)

…amples#1355)

…amples#1359)

…samples#1529)

* passing create task

* Passing tests

* updates to region tags

…1532)

…on-docs-samples#1541)

* update gcloud command for creating queues

* deploys and runs

* update license

* passing tests

…samples#1552)

…on-docs-samples#2516)

* Update to new library

* update library version

…on-docs-samples#2543)

…orm/python-docs-samples#2700)

…oogleCloudPlatform/python-docs-samples#3168)

…#3171)](GoogleCloudPlatform/python-docs-samples#3171)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [googleapis-common-protos](https://togithub.com/googleapis/googleapis) | minor | `==1.6.0` -> `==1.51.0` |

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…ples#2806)

* chore(deps): update dependency requests to v2.23.0

* Simplify noxfile and add version control.

* Configure appengine/standard to only test Python 2.7.

* Update Kokokro configs to match noxfile.

* Add requirements-test to each folder.

* Remove Py2 versions from everything execept appengine/standard.

* Remove conftest.py.

* Remove appengine/standard/conftest.py

* Remove 'no-sucess-flaky-report' from pytest.ini.

* Add GAE SDK back to appengine/standard tests.

* Fix typo.

* Roll pytest to python 2 version.

* Add a bunch of testing requirements.

* Remove typo.

* Add appengine lib directory back in.

* Add some additional requirements.

* Fix issue with flake8 args.

* Even more requirements.

* Readd appengine conftest.py.

* Add a few more requirements.

* Even more Appengine requirements.

* Add webtest for appengine/standard/mailgun.

* Add some additional requirements.

* Add workaround for issue with mailjet-rest.

* Add responses for appengine/standard/mailjet.

Co-authored-by: Renovate Bot <bot@renovateapp.com>

…orm/python-docs-samples#3955)

* Update dependency googleapis-common-protos to v1.52.0

* Update requirements.txt

* Update requirements.txt

* Update requirements.txt

Co-authored-by: Bu Sun Kim <8822365+busunkim96@users.noreply.github.com>

…udPlatform/python-docs-samples#4022)

…form/python-docs-samples#4049)

fixes #4045
fixes #4044

I don't know why these tests started to fail, but anyways we'd better
use fixtures and temporary queues.

…ues [(#4012)](GoogleCloudPlatform/python-docs-samples#4012)

* add python snippets and tests for creating, listing, and deleting queues

* fix grammar

* update licenses

* apply suggested fixes and format with black

* refine delete_queue_test with fixture for setup

* utilize fixtures and match format of create_http_task_test

* utilize fixtures in list_queues_test and create_queue_test

* make create_queue_test call the right function

* still attempt to delete queue after test runs in case of failure

* attempt to delete queue in case of failure, using try/except approach

* add print when NotFound is caught

* fix import

Co-authored-by: Averi Kitsch <akitsch@google.com>
Co-authored-by: Takashi Matsuo <tmatsuo@google.com>

…CloudPlatform/python-docs-samples#4183)

* docs(tasks): serviceAccountEmail parameter example

* docs(tasks): parameter name camel => snake case

* docs(tasks): comment order = function param order

…Platform/python-docs-samples#4279)

* chore(deps): update dependency pytest to v5.4.3

* specify pytest for python 2 in appengine

Co-authored-by: Leah Cole <coleleah@google.com>

…ocs-samples#4390)

…python-docs-samples#4473)

- added json payload compatibility
- fix imports and code block used on https://cloud.google.com/tasks/docs/creating-http-target-tasks#python

## Description

Fixes #<ISSUE-NUMBER>

Note: It's a good idea to open an issue first for discussion.

## Checklist
- [ ] I have followed [Sample Guidelines from AUTHORING_GUIDE.MD](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/master/AUTHORING_GUIDE.md)
- [ ] README is updated to include [all relevant information](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/master/AUTHORING_GUIDE.md#readme-file)
- [ ] **Tests** pass:   `nox -s py-3.6` (see [Test Environment Setup](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/master/AUTHORING_GUIDE.md#test-environment-setup))
- [ ] **Lint** pass:   `nox -s lint` (see [Test Environment Setup](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/master/AUTHORING_GUIDE.md#test-environment-setup))
- [ ] These samples need a new **API enabled** in testing projects to pass (let us know which ones)
- [ ] These samples need a new/updated **env vars** in testing projects set to pass (let us know which ones)
- [ ] Please **merge** this PR for me once it is approved.
- [ ] This sample adds a new sample directory, and I updated the [CODEOWNERS file](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/master/.github/CODEOWNERS) with the codeowners for this sample