YARN-2131. Addendum2: Document -format-state-store. Add a way to format the RMStateStore. (Robert Kanter via kasha)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1612634 13f79535-47bb-0310-9956-ffa450edef68

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/apt/YarnCommands.apt.vm

@@ -157,15 +157,16 @@ Usage: yarn [--config confdir] COMMAND
   Start the ResourceManager
 
 -------
-  Usage: yarn resourcemanager [-format]
+  Usage: yarn resourcemanager [-format-state-store]
 -------
 
 *---------------+--------------+
 || COMMAND_OPTIONS || Description                   |
 *---------------+--------------+
-| -format | Formats the RMStateStore. This will clear the RMStateStore and is
-|         | useful if past applications are no longer needed. This should be run
-|         | only when the ResourceManager is not running.
+| -format-state-store | Formats the RMStateStore. This will clear the
+|                     | RMStateStore and is useful if past applications are no
+|                     | longer needed. This should be run only when the
+|                     | ResourceManager is not running.
 *---------------+--------------+
 
 ** nodemanager