Alex fixes

[alex-ber]

Now, it works. :-)
Major

• conf/dfs.sh Removed $HADOOP_PREFIX/sbin/start-yarn.sh (it is useless here)
• conf/dfs.sh Added $HADOOP_PREFIX/sbin/start-dfs.sh (required)
• conf/dfs.sh Added hdfs dfs -chmod 777 /tmp/hadoop-yarn/staging
  (Required for impersonated Hive user to be able to start Map Reduce)
• conf/run.sh Added $HADOOP_PREFIX/sbin/start-dfs.sh (was missing, required)
• conf/mapres-site.xml added mapreduce.map.memory.mb, mapreduce.map.java.opts, mapreduce.reduce.java.opts.
  Otherwise, when MapReduce works it crushes JVM. Even hadoop-mapreduce-examples-2.8.5.jar don't work. See https://community.cloudera.com/t5/Support-Questions/Map-and-Reduce-Error-Java-heap-space/td-p/45874
• Hadoop “Unable to load native-hadoop library for your platform” warning fixed (added ENV LD_LIBRARY_PATH)
  (major performance impact)

Minor

• conf/run.sh copies to /etc/run.sh (and not to root)
• conf/core-site.xml fs.default.name key changed to fs.defaultFS
• conf/hdfs-site.xml dfs.name.dir key changed to fs.namenode.name.dir
• conf/hdfs-site.xml dfs.data.dir key changed to dfs.datanode.data.dir
• In Dockerfile Added nano
• LICENSE.txt added
• CHANGELOG.md is added

[mvk]

@alex-ber
Thanks for the patchset, please go over my comments and respond/change accordingly.

[mvk]

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