[feature/oauth] Token must be updated with the user_id

PHPBB3-11673
[feature/oauth] Start linking/registering OAuth accounts during login

PHPBB3-11673
[feature/oauth] Update comment to better reflect the action

PHPBB3-11673
[feature/oauth] Initial login_link ucp class

PHPBB3-11673
[feature/oauth] Fix error in token_storage::set_user_id()

PHPBB3-11673
[feature/oauth] Some work on login_link

PHPBB3-11673
[feature/oauth] Initial token storage tests

PHPBB3-11673
[feature/oauth] Token Storage retrieve access token test

PHPBB3-11673
[feature/oauth] Replace spaces with tabs

PHPBB3-11673
[feature/oauth] Token storage test set_user_id()

PHPBB3-11673
[feature/oauth] Clean up oauth_tokens test fixture

PHPBB3-11673
[feature/oauth] Has Access Token test

PHPBB3-11673
[feature/oauth] Clear token storage test

PHPBB3-11673
[feature/oauth] Fixes for problems found by tests

PHPBB3-11673
[feature/oauth] Refactor clear token test to get more useful output first

PHPBB3-11673
[feature/oauth] Finish fixes from tests and tests for token storage

PHPBB3-11673