721314 - add man pages for pulp-admin and pulp-consumer

Docs for pulp-admin and pulp-consumer already exist but were only being
rendered as HTML and not man pages.

This commit adds the docs as man pages to the spec file.

Note that the man pages need to be built and checked in as a release build
step. This is to avoid running sphinx-build in a build environment. Older
versions of python-sphinx (0.6.x) do not support all of the features we use.
Additionally, we cannot use intersphinx in build environments where the build
scripts cannot reach external hosts.