* ticket/11568:
[ticket/11568] Split status code and html debug assertion into two methods
[ticket/11568] Add comma at end of array key-value couple
[ticket/11568] Invert logic for asserting the response
[ticket/11568] Use static calls for static methods
Conflicts:
tests/test_framework/phpbb_functional_test_case.php
* ticket/11568:
[ticket/11568] Add method to get page content
[ticket/11568] Allow different status codes
[ticket/11568] Trim the output to allow Tabs before INCLUDE overall_header
[ticket/11568] Fix common_groups_test.php form handling
[ticket/11568] Make CookieJar static aswell
[ticket/11568] Remove manual calls to assert_response_success()
[ticket/11568] Only use a static version of the client
[ticket/11568] Any output before the doc type means there was an error
[ticket/11568] Set client manually so we can increase the cURL timeout
[ticket/11568] Use Goutte Client to install the board for functional tests
Conflicts:
tests/test_framework/phpbb_functional_test_case.php
Users should not be deleted in tests that test user creation.
Tests should use unique user names to avoid collisions.
User deletion should use user_remove anyway.
PHPBB3-10972
Always add users, do not keep track of which users have been added.
The tests should know whether users they want exist or not.
Use more unique user names in tests for robustness.
Added some more assertions here and there.
PHPBB3-10972
