Spec file fixes for pulp on RHEL 5 and RHEL 6

python-sphinx is called python-sphinx10 in EPEL 6. Additionally, there was a
bash_completion error when building on RHEL 5.

Note that on RHEL 5, we do not include man pages for pulp-consumer. This is
because the version of python-sphinx is too old to build the man pages.
Merge pull request #1346 from beav/spec-fix

Spec file fixes for pulp on RHEL 5 and RHEL 6