Re-enable AutoML model create tests

[busunkim96]

Closes#3706.

I don't have the context around why these tests were disabled. Does these tests need to be modified in some other way?

#1608 disabled these tests.

[tmatsuo]

Few things.

1. The tests are using the following code:

model_name = "test_" + datetime.datetime.now().strftime("%Y%m%d%H%M%S")

This easily conflicts among multiple builds. Can you update this to use uuid?

2. The tests are calceling the operation, but it's a best effort trial of cancellation, so sometimes the models are created before the cancellation happens. I think we should try to delete the models in teardown code.

[sirtorry]

these samples are outdated. samples and tests can be deleted. translate doc and vision doc reference other snippets.

[tmatsuo]

@sirtorry
Thanks for the input.

I did a quick search for the region tag, and there are still used in multiple location. Although they're all translated page, can we really delete them now?

[sirtorry]

I'm going to submit a request for these samples to be replaced on our localised/non-english documentation. We shouldn't remove the samples until that's been done. In this case, should we re-enable these tests?

[busunkim96]

Opened #3766 to track removing those samples.

I'm alright with closing this and leaving the tests disabled. @tmatsuo Is that alright with you?

[tmatsuo]

@busunkim96 Yes, it's alright!