Fix #2492864 (Upsync failures in Exchange 2003)

* Of all crazy things, Exchange 2003 doesn't like uploading the organizer's
  email/name in changes.  This isn't documented anywhere.
* Don't send up organizer name/email on changes.

Bug: 2492864
Change-Id: I1f2aefb6f9020025578325c5c7b3cf869f17e27f
1 file changed