Storm-YARN for Apache Hadoop 2.1.0

This pull request enable Storm-YARN works with Apache Hadoop 2.1.0. 
It has been tested with 2.1.0-beta code 

Since Apache 2.1.0-beta is not available in maven repository yet, you should take the following steps first tries out storm-yarn code:

   * git clone  git@github.com:apache/hadoop-common.git -b branch-2.1.0-beta hadoop-2.1.0-beta
   * cd hadoop-2.1.0-beta
   * use JDK6
   * mvn clean install -DskipTests
   * mvn package -Pdist -DskipTests
   * switch to JDK7

The above steps will produce maven packages for your local repos, and create a hadoop 2.1.0 distribution.
The binary distribution is located at hadoop-2.1.0-beta/hadoop-dist/target/hadoop-2.1.0-beta