[Hub Generated] Review request for Microsoft.AppPlatform to add version preview/2019-05-01-preview (#10302)

* Fix swagger by adding readonly for properties.

* Update samples.

Author: bowen5

specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/appplatform.json

@@ -2792,11 +2792,13 @@
       "properties": {
         "resourceName": {
           "description": "The name of the bound resource",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "resourceType": {
           "description": "The standard Azure resource type of the bound resource",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "resourceId": {
           "description": "The Azure resource id of the bound resource",
@@ -3006,7 +3008,8 @@
         },
         "appName": {
           "description": "The app name of domain.",
-          "type": "string"
+          "type": "string",
+          "readOnly": true
         },
         "certName": {
           "description": "The bound certificate name of domain.",

specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Bindings_CreateOrUpdate.json

@@ -2,8 +2,6 @@
   "parameters": {
     "bindingResource": {
       "properties": {
-        "resourceName": "my-cosmosdb-1",
-        "resourceType": "Microsoft.DocumentDB",
         "resourceId": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myResourceGroup/providers/Microsoft.DocumentDB/databaseAccounts/my-cosmosdb-1",
         "key": "xxxx",
         "bindingParameters": {

specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/Bindings_Update.json

@@ -2,8 +2,6 @@
   "parameters": {
     "bindingResource": {
       "properties": {
-        "resourceName": null,
-        "resourceType": null,
         "key": "xxxx",
         "bindingParameters": {
           "databaseName": "db1",

specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/CustomDomains_CreateOrUpdate.json

@@ -3,7 +3,6 @@
     "domainResource": {
       "properties": {
         "thumbprint": "934367bf1c97033f877db0f15cb1b586957d3133",
-        "appName": "myapp",
         "certName": "mycert"
       }
     },

specification/appplatform/resource-manager/Microsoft.AppPlatform/preview/2019-05-01-preview/examples/CustomDomains_Patch.json

@@ -3,7 +3,6 @@
     "domainResource": {
       "properties": {
         "thumbprint": "934367bf1c97033f877db0f15cb1b586957d3133",
-        "appName": "myapp",
         "certName": "mycert"
       }
     },