Creating development branch for MAPREDUCE-2841

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/MR-2841@1610815 13f79535-47bb-0310-9956-ffa450edef68
Import initial code for MAPREDUCE-2841 (native output collector)

Contributed by:
  Binglin Chang
  Yang Dong
  Sean Zhong
  Manu Zhang
  Zhongliang Zhu
  Vincent Wang
  Yan Dong
  Cheng Lian
  Xusen Yin
  Fangqin Dai
  Jiang Weihua
  Gansha Wu
  Avik Dey


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/MR-2841@1611413 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5985. native-task: Fix build on macosx. Contributed by Binglin Chang

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/MR-2841@1612659 13f79535-47bb-0310-9956-ffa450edef68
Merge trunk into branch


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/MR-2841@1612742 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5994. Simplify ByteUtils and fix failing test. Contributed by Todd Lipcon.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/MR-2841@1613003 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5996. native-task: Rename system tests into standard directory layout. Contributed by Todd Lipcon.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/MR-2841@1613004 13f79535-47bb-0310-9956-ffa450edef68
Merge trunk into branch


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/MR-2841@1613007 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5997. native-task: Use DirectBufferPool from Hadoop Common. Contributed by Todd Lipcon.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/MR-2841@1613034 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-6000. native-task: Simplify ByteBufferDataReader/Writer. Contributed by Todd Lipcon.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/MR-2841@1613036 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5991. native-task should not run unit tests if native profile is not enabled. Contributed by Binglin Chang.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/MR-2841@1613072 13f79535-47bb-0310-9956-ffa450edef68
Add entry to branch's CHANGES.txt for previous commit


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/MR-2841@1613827 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5995. native-task: Revert changes to Text internals. Contributed by Todd Lipcon.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/MR-2841@1613828 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-6005. native-task: Fix some valgrind errors (Binglin Chang)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/MR-2841@1615489 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5984. native-task: Reuse lz4 sources in hadoop-common. Contributed by Binglin Chang

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/MR-2841@1616105 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5976. native-task: should not fail to build if snappy is missing (Manu Zhang)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/MR-2841@1616115 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-5978. native-task: remove test case for not supported codec Bzip2Codec and DefaultCodec (Manu Zhang)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/MR-2841@1616116 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-6006. native-task: add native tests to maven and fix bug in pom.xml. Contributed by Binglin Chang.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/MR-2841@1617877 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-6026. native-task: fix logging. Contributed by Manu Zhang.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/MR-2841@1617878 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-6035. native-task: sources/test-sources jar distribution. Contributed by Manu Zhang.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/MR-2841@1617879 13f79535-47bb-0310-9956-ffa450edef68
MAPREDUCE-6025: distribute nativetask.so to right folder (Manu Zhang)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/MR-2841@1618120 13f79535-47bb-0310-9956-ffa450edef68