message: enum name change
diff: "InstanceFlexibility" : {
  "type" : "string",
  "description" : "Turning this on will apply the reservation discount to other VMs in the same VM size group. Only specify for VirtualMachines reserved resource type.",
  - "enum" : [ true, false ],
  + "enum" : [ "On", "Off" ],
  "x-ms-enum" : {
  "name" : "InstanceFlexibility",
  "modelAsString" : true
  