VMWare does not package vmware-tools-esx-nox for EL7. They
instead recommend the use of open-vm-tools. Added a condition
and refactored the manifest appropriately.

wheezy systems.

It turns out the the only special case in the pam configuration was
for etch.  The files suffixed with .lenny actually was the default
configuration and not lenny specific.

[os][rpm] Support CentOS via its own class, stub an OEL
class, small fixes to redhat.pp to be generic enough for use
by these RHEL-ish operating systems, edits to allow EL7-
specific repository inclusions {and exclusions} (jlent)

It was possible to override the sshd_config file only with a complete
file.  This change allows the sshd_config file to be specified as a
template.