BAP-13713: Absolute path constants __DIR__ and __FILE__ should not be used (#7577)
BAP-13713: Absolute path constants __DIR__ and __FILE__ should not be used (#7577)

- Replaced __DIR__ constants with native symfony2 methods
- Replaced php constants in Migrations
- Fixed migrations errors

orocrm/OroCalendarBundle,orocrm/OroCalendarBundle,orocrm/OroCalendarBundle