Add more tests, remove opendirectory wrapper and associated modules


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@12127 e27351fd-9f3e-4f54-a53b-843176b1656c
Fix preamble to add source root to sys.path.


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@12128 e27351fd-9f3e-4f54-a53b-843176b1656c
cleanup


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@12129 e27351fd-9f3e-4f54-a53b-843176b1656c