Removing read only property to allow update operations as per the act…

…ual implementation (Azure#9874)

* Correcting the swagger to accept downloadToken similar to other download operations

Correcting the swagger to accept downloadToken similar to other download operations

* Adding the missing api-version parameter for move and validate move apis. IT is already part of the examples.

Adding the missing api-version parameter for move and validate move apis. IT is already part of the examples.

* Removing reonly property to allow update operations

Removing reonly property to allow update operations

Co-authored-by: Anirban Sarkar <ansar@microsoft.com>

specification/billing/resource-manager/Microsoft.Billing/stable/2020-05-01/billing.json

@@ -5689,18 +5689,15 @@
         },
         "principalId": {
           "description": "The principal id of the user to whom the role was assigned.",
-          "type": "string",
-          "readOnly": true
+          "type": "string"
         },
         "principalTenantId": {
           "description": "The principal tenant id of the user to whom the role was assigned.",
-          "type": "string",
-          "readOnly": true
+          "type": "string"
         },
         "roleDefinitionId": {
           "description": "The ID of the role definition.",
-          "type": "string",
-          "readOnly": true
+          "type": "string"
         },
         "scope": {
           "description": "The scope at which the role was assigned.",
@@ -5709,13 +5706,11 @@
         },
         "userAuthenticationType": {
           "description": "The authentication type.",
-          "type": "string",
-          "readOnly": true
+          "type": "string"
         },
         "userEmailAddress": {
           "description": "The email address of the user.",
-          "type": "string",
-          "readOnly": true
+          "type": "string"
         }
       }
     },