Make sure test fails if any one delete in a DELETEALL fails.


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@13959 e27351fd-9f3e-4f54-a53b-843176b1656c
Change index to improve performance.


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@13960 e27351fd-9f3e-4f54-a53b-843176b1656c