hadoop-2.0.2-alpha RC2.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/tags/release-2.0.2-alpha-rc2@1392683 13f79535-47bb-0310-9956-ffa450edef68
Release hadoop-2.0.2-alpha

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/tags/release-2.0.2-alpha@1397187 13f79535-47bb-0310-9956-ffa450edef68
fix to balancer problem for OPS-810
Merge pull request #14 from VertiPub/2.0.3-chutong

attempting to merge https://github.com/VertiPub/hadoop-common/pull/12 to the 2.0.3-vcc branch