[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/12602] Coding style correction.

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

PHPBB3-12602
Merge pull request #2509 from Stephannos/ticket/12602

[ticket/12602] Add command to print the cron list

* Stephannos/ticket/12602:
  [ticket/12602] Fix spaces issues.
  [ticket/12602] Coding style correction.
  [ticket/12602] Fix coding style mistakes.
  [ticket/12602] Headers updated.
  [ticket/12602] Changes to respect coding style and to factorize code.
  [ticket/12602] Cleanup tests
  [ticket/12602] Add function get_tasks.
  [ticket/12602] Correction of the output message for the cron list
  [ticket/12602] Add files to print the cron list and test files.