[ticket/11948] Add second routing file to tests

PHPBB3-11948
[ticket/11948] Allow multiple routing files for extensions

PHPBB3-11948
[ticket/11948] Use basename and dirname

PHPBB3-11948
[ticket/11948] Allow resource importing for routing

PHPBB3-11948
[ticket/11948] Check actual result of routes

PHPBB3-11948
Merge pull request #1801 from nickvergessen/ticket/11948

Ticket/11948 Extensions should be allowed to have more then 1 routing file