Allow admins to modify updatedOn date

[kevinhinterlong]

By default the updatedOn date should be the last change, but it would be useful to keep it the same for migration purposes if manually specified

framework/packages/webservice/models/src/main/kotlin/com/yahoo/navi/ws/models/beans/Asset.kt

Lines 51 to 52 in 3a7ab53

	@UpdatePermission(expression = NOBODY)
	var updatedOn: Date? = null