Updated OpenShift template

OpenShift Origin images require a lot of packages. So, although the OpenShift
Origin HEAT template can be adapted to run with JEOS images, they would take
> 25 min to spin up. Instead, I have opted to create heavier images to speed up
machine creation. @See https://github.com/sdake/heat-jeos/pull/49

Change-Id: I371d28a9833a48a6b588f907cce3298b30552e90
Fix the exception message in stack_resource.get_output()

Change-Id: Ifa81e3e9062e3e731ff1989f41f390171c203c71
Merge "Updated OpenShift template"