[AWS tests] AWS test should not run for canonical datasets
{'login': 'patrickvonplaten', 'id': 23423619, 'node_id': 'MDQ6VXNlcjIzNDIzNjE5', 'avatar_url': 'https://avatars.githubusercontent.com/u/23423619?v=4', 'gravatar_id': '', 'url': 'https://api.github.com/users/patrickvonplaten', 'html_url': 'https://github.com/patrickvonplaten', 'followers_url': 'https://api.github.com/users/patrickvonplaten/followers', 'following_url': 'https://api.github.com/users/patrickvonplaten/following{/other_user}', 'gists_url': 'https://api.github.com/users/patrickvonplaten/gists{/gist_id}', 'starred_url': 'https://api.github.com/users/patrickvonplaten/starred{/owner}{/repo}', 'subscriptions_url': 'https://api.github.com/users/patrickvonplaten/subscriptions', 'organizations_url': 'https://api.github.com/users/patrickvonplaten/orgs', 'repos_url': 'https://api.github.com/users/patrickvonplaten/repos', 'events_url': 'https://api.github.com/users/patrickvonplaten/events{/privacy}', 'received_events_url': 'https://api.github.com/users/patrickvonplaten/received_events', 'type': 'User', 'site_admin': False}
[]
[]
AWS tests should in general not run for canonical datasets. Only local tests will run in this case. This way a PR is able to pass when adding a new dataset.

This PR changes to logic to the following: 

1) All datasets that are present in `nlp/datasets` are tested only locally. This way when one adds a canonical dataset, the PR includes his dataset in the tests.

2) All datasets that are only present on AWS, such as `webis/tl_dr` atm are tested only on AWS. 

I think the testing structure might need a bigger refactoring and better documentation very soon. 

Merging for now to unblock new PRs @thomwolf @mariamabarham .
{'url': 'https://api.github.com/repos/huggingface/datasets/issues/144/reactions', 'total_count': 0, '+1': 0, '-1': 0, 'laugh': 0, 'hooray': 0, 'confused': 0, 'heart': 0, 'rocket': 0, 'eyes': 0}
{'url': 'https://api.github.com/repos/huggingface/datasets/pulls/144', 'html_url': 'https://github.com/huggingface/datasets/pull/144', 'diff_url': 'https://github.com/huggingface/datasets/pull/144.diff', 'patch_url': 'https://github.com/huggingface/datasets/pull/144.patch', 'merged_at': '2020-05-16T13:44:33Z'}