HDFS-5283. Under construction blocks only inside snapshots should not be counted in safemode threshhold.  Contributed by Vinay


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1532857 13f79535-47bb-0310-9956-ffa450edef68
Add TestOpenFilesWithSnapshot.java for HDFS-5283.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1532860 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5585. TestCopyCommitter#testNoCommitAction Fails on JDK7 (jeagles)

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HADOOP-9897. Add method to get path start position without drive specifier in o.a.h.fs.Path. Contributed by Binglin Chang.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1532880 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5586. TestCopyMapper#testCopyFailOnBlockSizeDifference fails when run from hadoop-tools/hadoop-distcp directory (jeagles)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1532887 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5370. Typo in Error Message: different between range in condition and range in error message. Contributed by Kousuke Saruta.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1532899 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10005. No need to check INFO severity level is enabled or not. Contributed by Jackie Chang.

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HDFS-5346. Avoid unnecessary call to getNumLiveDataNodes() for each block during IBR processing. Contributed by Ravi Prakash.

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