Feature: Impala

Running Impala on a Hadoop cluster:

Add the following recipes to an already running Hadoop
cluster with Hive installed and configured

On the Hive metastore node (usually the hh facet):
  recipe 'impala::default'
  recipe 'impala::config'
  recipe 'impala::state_store'
  recipe 'impala::catalog'
  recipe 'impala::shell'

On every dnnm facet:
  recipe 'impala::default'
  recipe 'impala::config'
  recipe 'impala::server'

Squashed commit of the following:

commit 99a477b00d0c7ce2f36580b39ff52fba111ec43d
Author: Travis Dempsey <travis@infochimps.com>
Date:   Tue Jun 3 10:56:40 2014 -0500

    impala on cloudera cdh5

    Change-Id: I2ada3232ecd6f8310b8fcc833c9389c520b64248

Change-Id: I6d8aa45e888ea52e1f603d8b0aa7f958b9f9e178