(PUP-1433) Create example environment for redhat

This adds the example environment for the RPM packages. See the previous
commit for an explanation about why environments are being added to
packages in this manner.

This also moves the README.environment into a shared location so that it
can be kept the same between various packaging systems.
(PUP-1433) List all created directories in deb

The previous commits relied on automatic creation of parent directories.
This explicitly calls out each directory, which brings the debs in line
with how the rpms are expressed.