Regardless of documentation covering the supported Operating
Systems for a given release, there are still issues that arise
which turn out to relate to someone using an unsupported
OS.
This patch adds an early pre-requisite check for both an AIO
and a full deployment to hard stop the deployment if an
unsupported OS is detected on any host.
Related-Bug: 1638113
Change-Id: I6bc1a15e1283d496adb82a67989486f814e341c7
c8da904f00