Fixed operation ID for configuration operation (#3424)

Author: wawon-msft

specification/hdinsight/resource-manager/Microsoft.HDInsight/preview/2018-06-01-preview/configurations.json

@@ -37,8 +37,8 @@
                 "tags": [
                     "Configurations"
                 ],
-                "operationId": "Configurations_UpdateHTTPSettings",
-                "description": "Configures the HTTP settings on the specified cluster.",
+                "operationId": "Configurations_Update",
+                "description": "Configures the configuration on the specified cluster.",
                 "x-ms-examples": {
                     "Enable HTTP connectivity": {
                         "$ref": "./examples/ChangeHttpConnectivityEnable.json"