Move parameter to keep order in SDK (#4376)

Author: EvgenyAgafonchikov

specification/network/resource-manager/Microsoft.Network/stable/2018-08-01/virtualNetwork.json

@@ -739,13 +739,6 @@
         "operationId": "VirtualNetworks_CheckIPAddressAvailability",
         "description": "Checks whether a private IP address is available for use.",
         "parameters": [
-          {
-            "name": "ipAddress",
-            "in": "query",
-            "required": true,
-            "type": "string",
-            "description": "The private IP address to be verified."
-          },
           {
             "name": "resourceGroupName",
             "in": "path",
@@ -760,6 +753,13 @@
             "type": "string",
             "description": "The name of the virtual network."
           },
+          {
+            "name": "ipAddress",
+            "in": "query",
+            "required": true,
+            "type": "string",
+            "description": "The private IP address to be verified."
+          },
           {
             "$ref": "./network.json#/parameters/ApiVersionParameter"
           },