More OD cleanup


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@12113 e27351fd-9f3e-4f54-a53b-843176b1656c
cosmetic


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@12114 e27351fd-9f3e-4f54-a53b-843176b1656c
Remove dependency on opendirectory.py.  Woot.


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@12115 e27351fd-9f3e-4f54-a53b-843176b1656c