HDFS-4030. BlockManager excessBlocksCount and postponedMisreplicatedBlocksCount should be AtomicLongs. Contributed by Eli Collins


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1430549 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4031. Update findbugsExcludeFile.xml to include findbugs 2 exclusions. Contributed by Eli Collins


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1430552 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4033. Miscellaneous findbugs 2 fixes. Contributed by Eli Collins


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1430576 13f79535-47bb-0310-9956-ffa450edef68