Format the namenode on container startup instead of image creation
Merge pull request #25 from rrati/create-dirs-on-start

Format the namenode on container startup instead of image creation
Merge remote-tracking branch 'upstream/master'
Install the mapreduce package in the resourcemgr container and expose ports
for the historyserver
Merge pull request #26 from rrati/history-server-fixes

History server fixes