Skumar/resource health r2018 linting (Azure#18310)

* Defining the APIs for the new NSP resource

* fixed R2018 linting error in ResourceHealth.json

Co-authored-by: Hari Prasad Perabattula <harics24@users.noreply.github.com>
Co-authored-by: Hari Prasad Perabattula <haperaba@microsoft.com>

Author: 3 people

specification/resourcehealth/resource-manager/Microsoft.ResourceHealth/stable/2020-05-01/ResourceHealth.json

@@ -679,6 +679,10 @@
       "enum": [
         "default"
       ],
+      "x-ms-enum": {
+        "name": "IssueNameParameter",
+        "modelAsString": true
+      },
       "x-ms-parameter-location": "method"
     },
     "ResourceGroupNameParameter": {