Updates package installs for HDP images

This patch updates several package installs for the HDP 1.3.2
  and 2.0.6 images.
Testing revealed that the version of Ambari installed on the
  HDP images was out of date, and so this patch updates the
  Ambari version to be in line wth the HDP plugin's
  requirements.
Various updates to the installed packages in order to reduce
  the startup time of HDP clusters, since these packages were
  being installed by Ambari at startup time previously.

Change-Id: I797e2d0eb30181c1be9643dea9c6d86c917cf6e5
Updated from global requirements

Change-Id: Idb844ccaced77eecc086727cced8ca040c7a0c62
Merge "Updates package installs for HDP images"
Update Spark element

Fix Spark element to work with the updated hadoop-cdh element.
Install Spark version 0.9.1 in /opt so that the default user can connect
and immediately start working.
Setup a short firstboot script to take care of file permissions for the
ubuntu user.

Change-Id: I2ab1f810e340b75cf368dd1647816e1d725dd916
Fixes image creation script to work on CentOS

This patch makes a small fix to the diskimage-create.sh script,
  which allows this script to run on a CentOS 6.4/6.5 machine.
The diskimage-builder project appears to depend upon the
  python-argparse package, but in many cases this is not
  installed by default on CentOS.
This patch resolves this problem by installing the EPEL yum
  repo, as well as the python-argparse, when the CentOS
  platform is detected by the script.

Closes-Bug: #1315140

Change-Id: I51c266337b10b2dd75bf1076a409115dea979226
Merge "Fixes image creation script to work on CentOS"
Merge remote-tracking branch 'openstack/master'