Better session handling fix
Even better fix, fixes unit tests too
updated translation resources
Merge branch '2.5.x' into cc-5709-airtime-analyzer

Conflicts:
	airtime_mvc/application/Bootstrap.php
	airtime_mvc/locale/de_AT/LC_MESSAGES/airtime.po
	airtime_mvc/locale/en_GB/LC_MESSAGES/airtime.po
	airtime_mvc/locale/pt_BR/LC_MESSAGES/airtime.po