Fix bug where TENTATIVE events were marked as BUSY instead of BUSY-TENTATIVE (#5467)
Summary:
Fixes #5467
For events where user was an attendee, status was not taken correctly from ATTENDEE element
Reviewers: Free/Busy Developers, vanmeeuwen
Reviewed By: Free/Busy Developers, vanmeeuwen
Differential Revision: https://git.kolab.org/D194