add openapi-subtype (#11639)

Author: sanjaiganesh

specification/adp/resource-manager/readme.md

@@ -27,6 +27,7 @@ These are the global settings for the adp.
 ```yaml
 title: AdpManagementClient
 openapi-type: arm
+openapi-subtype: rpaas
 tag: package-2020-07-01-preview
 ```
 

specification/azurestackhci/resource-manager/readme.md

@@ -28,6 +28,7 @@ These are the global settings for the azurestackhci.
 title: AzureStackHCIClient
 description: Azure Stack HCI management service
 openapi-type: arm
+openapi-subtype: rpaas
 tag: package-2020-10
 ```
 

specification/datadog/resource-manager/readme.md

@@ -25,6 +25,7 @@ These are the global settings for the Datadog API.
 ``` yaml
 title: Microsoft Datadog Client
 openapi-type: arm
+openapi-subtype: rpaas
 tag: package-2020-02-preview
 ```
 

specification/hybridkubernetes/resource-manager/readme.md

@@ -27,6 +27,7 @@ These are the global settings for the Kubernetes Connect RP.
 
 ```yaml
 openapi-type: arm
+openapi-subtype: rpaas
 tag: package-2020-01-01-preview
 ```
 

specification/windowsesu/resource-manager/readme.md

@@ -26,6 +26,7 @@ These are the global settings for the windowsesu.
 
 ```yaml
 openapi-type: arm
+openapi-subtype: rpaas
 tag: package-2019-09-16-preview
 ```