add default

Author: david-msft

specification/analysisservices/resource-manager/Microsoft.AnalysisServices/stable/2017-08-01/analysisservices.json

@@ -1251,6 +1251,7 @@
             "type": "string",
             "description": "The UPN of the user. For example: [email protected]."
           },
+          "default": [],
           "description": "An array of administrator user identities."
         }
       }
@@ -1265,7 +1266,8 @@
             "$ref": "#/definitions/IPv4FirewallRule",
             "description": "The content of firewall rule."
           },
-          "description": "An array of firewall rules."
+          "description": "An array of firewall rules.",
+          "default":[]
         },
         "enablePowerBIService": {
           "type": "boolean",