HDDS-933. Add documentation for genconf tool under Tools section. Contributed by Dinesh Chitlangia.

hadoop-hdds/docs/content/genconf.md

@@ -0,0 +1,28 @@
+---
+title: "Generate Configurations"
+date: 2018-12-18
+menu:
+   main:
+      parent: Tools
+---
+<!---
+  Licensed to the Apache Software Foundation (ASF) under one or more
+  contributor license agreements.  See the NOTICE file distributed with
+  this work for additional information regarding copyright ownership.
+  The ASF licenses this file to You under the Apache License, Version 2.0
+  (the "License"); you may not use this file except in compliance with
+  the License.  You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+-->
+
+Genconf tool generates a template ozone-site.xml file at the specified path.
+This template file can be edited to replace with proper values.
+
+`ozone genconf <path>`