RequestFactory: Added methods to assist in creating UpdateItem requests, allows updating multiple fields simultaneously.
ResponseUtils: Added methods for parsing UpdateItem responses
BaseExchangeCalendarDataDao: Only retry operations on an ExchangeWebServicesRuntime exception type.  All other exceptions should be thrown immediately.
UpdateCalendarItemIntegrationTest: new integration test which creates a calendar item, updates specific properties, verifies results on the server and finally deletes the calendaer items.
ExtendedPropertyIntegrationTest: new integration test which will create a calendar item with a 2D array of strings, update the calendar items subject and extended properties and verifies results.