Sort multi-valued parameters.


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@13371 e27351fd-9f3e-4f54-a53b-843176b1656c
Fix group member ordering test issues.


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@13372 e27351fd-9f3e-4f54-a53b-843176b1656c