Changing object model to accomodate new property

[fraga]

New property seen on when trying to export calendar updates - property DownTime was changed to DownTimeInMinutes. Data contains UpcomingCalendarViewModel array causing exception

{
	"Success": true,
	"Message": null,
	"MessageTitle": null,
	"Data": {
		"UpcomingCalendarViewModels": [
			{
				"EnvironmentName": "ENV",
				"StatusEnum": 5,
				"EventNameEnum": 0,
				"CalendarId": 999999,
				"UtcStartDateTime": "2021-07-10T08:00:00",
				"EnvironmentId": "999999-9999-999-9999-999999999999",
				"Month": "July",
				"Date": "2021-07-10",
				"Time": "04:00 AM",
				*"DownTimeInMinutes": 180,*
				"EventName": "Update Sandbox",
				"Status": "Paused",
				"IsModified": false,
				"WorkflowInstanceId": 99999
			}
		]
	}
}