HadoopArgs: hadoopVal needs to be a lazy val
This is because it depends on initialization of the member hadoopOpts, which is done
in the call to "parse" which is done after the HadoopArgs trait is initialized
ansible ec2 deployment

based on spark stand-alone cluster scripts
EC2 Security Group config
HDFS on EC2
switched to CDH5 hdfs 2.3
HDFS 2.3 config
Merge remote-tracking branch 'upstream/master' into misc_changes
pptpd role to use for gateway
CDH5 spark role
move size into hdfs volumes dict
clean vars
add unit test BuildPyramidSpec, share code with IngestSpec
playbook refactors
add: error msg
HadoopArgs: minor change, removed println
fix: lots of weird bugs and cleanup
added handlers for hadoop config change
HDFS needs AWS creds, sweet
installing jvm is part of allocation, not setup
Build: take Hadoop version from environment