[ticket/12470] Move phing sniff into new .sh

PHPBB3-12470
[ticket/12470] Move setup of database to new .sh

PHPBB3-12470
[ticket/12470] Move setup of phpBB to new .sh

PHPBB3-12470
[ticket/12470] Fix setup of phpbb

PHPBB3-12470
[ticket/12470] Correctly set up the php extensions

PHPBB3-12470
Merge pull request #2375 from nickvergessen/ticket/12470

Ticket/12470 Move commands from .travis.yml to separate files to allow reusing

* nickvergessen/ticket/12470:
  [ticket/12470] Correctly set up the php extensions
  [ticket/12470] Fix setup of phpbb
  [ticket/12470] Move setup of phpBB to new .sh
  [ticket/12470] Move setup of database to new .sh
  [ticket/12470] Move phing sniff into new .sh