[ticket/12602] Add files to print the cron list and test files.

PHPBB3-12602
[ticket/12602] Correction of the output message for the cron list

PHPBB3-12602
[ticket/12602] Add function get_tasks.

PHPBB3-12602
[ticket/12602] Cleanup tests

PHPBB3-12602
Merge pull request #3 from Nicofuma/Stephannos-ticket/12602

[ticket/12602] Cleanup tests
[ticket/12602] Changes to respect coding style and to factorize code.

PHPBB3-12602
[ticket/12602] Headers updated.

PHPBB3-12602
[ticket/12602] Fix coding style mistakes.

PHPBB3-12602
[ticket/12655] Run the shell when --shell is used

PHPBB3-12655
[ticket/12655] Don't require acp/common again in the commands

PHPBB3-12655
[ticket/12655] Set the arguments of \phpbb\console\application as required

PHPBB3-12655
[ticket/12602] Coding style correction.

PHPBB3-12602
[ticket/12655] Fix coding style in \phpbb\console\application

PHPBB3-12655
[ticket/12602] Fix spaces issues.

PHPBB3-12602
[ticket/12655] Make the --shell option available only for phpbbcli.php

PHPBB3-12655
[ticket/12655] Fix coding style

PHPBB3-12655
[ticket/12655] Don't try to restore the definition in the help

PHPBB3-12655
[ticket/12655] Set register_container_commands as public

PHPBB3-12655
[ticket/12602] Fix internationalisation of cron_list.php

PHPBB3-12602
[ticket/12602] Add types, change description of cron:list.

PHPBB3-12602