Allow the server host:port to be specified.


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@13776 e27351fd-9f3e-4f54-a53b-843176b1656c
Fix tests after group sharing changes.


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@13777 e27351fd-9f3e-4f54-a53b-843176b1656c