Fix for failure to do free-busy request when it includes a VTIMEZONE component.
Fix for failure to do free-busy request when it includes a VTIMEZONE component.

git-svn-id: 0c33e958600270102f91bf5868e396345dde476c@1524 e27351fd-9f3e-4f54-a53b-843176b1656c

red-hood/calendarserver,red-hood/calendarserver,red-hood/calendarserver,red-hood/calendarserver,red-hood/calendarserver,red-hood/calendarserver