Changes to Update event

added the new optional request property agenda

added the new optional request property customConcessions

added the new optional request property customQuestions

added the new optional request property eventDates

added the new optional request property eventSource

added the new optional request property eventSourceOtherText

added the new optional request property meetingRoomCountsByDate

added the new optional request property meetingRoomRequirements

added the new optional request property notesLocationBudget

added the new optional request property numHotelRoomsNeeded

added the new optional request property venueFacingEventName

added the new optional request property venueTypes

added the media type application/json for the response with the status 200