(MODULES-5501) - Remove unsupported Ubuntu
(MODULES-5501) - Remove unsupported Ubuntu

Removing older version of Ubuntu that are not supported by the module.

HelenCampbell/puppetlabs-stdlib,fuel-infra/puppetlabs-stdlib,jbondpdx/puppetlabs-stdlib,puppetlabs/puppetlabs-stdlib,DavidS/puppetlabs-stdlib