Add tez recipe
Fix interpolation issue
Document node['tez']['conf_dir']
Remove duplicate attribute initialization
Prepend new classpath entries if already defined
Remove redundant test
Add HDP install guard
Fix spec description
Replace Array
Remove duplicate dfs initialization
Concatenate commands with &&
Merge remote-tracking branch 'origin/master' into add-tez

* origin/master:
  Version bump to 1.8.1
  CHANGELOG entry for #131
  CHANGELOG update
  renamed default['spark']['release']['spark_version'] to default['spark']['release']['version'] (as referenced in recipes/spark.rb)
  fix spark symbolic link definition
  Remove the code to duplicate YARN config into container-executor.cfg
  Cloudera has Trusty packages, now
  Spark MLib requires libgfortran

Conflicts:
	metadata.json
	metadata.rb
Merge pull request #127 from mandrews/add-tez

Add tez