Add default author information to docfx.json

docfx.json

@@ -259,6 +259,12 @@
       }
     },
     "fileMetadata": {
+      "author": { 
+        "docs-ref-services/**": "azure-sdk"
+      },
+      "ms.author": { 
+        "docs-ref-services/**": "azsdkdocs"
+      },
       "feedback_system": {
         "docs-ref-autogen/**/*": "None",
         "preview/docs-ref-autogen/**/*": "None",