use spaces instead of tabs in resource files


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@13863 e27351fd-9f3e-4f54-a53b-843176b1656c
use CalDAVTester r13861


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@13864 e27351fd-9f3e-4f54-a53b-843176b1656c
Basic test for group attendee expansion.


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@13865 e27351fd-9f3e-4f54-a53b-843176b1656c
Tweak attendee group expansion to clean-up the parameters on the group attendee property.


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@13866 e27351fd-9f3e-4f54-a53b-843176b1656c