Update Fedora and CentOS templates for common conf includes.

This updates the Fedora and CentOS templates to utilize a common
included config.  This is largely based on the changes in the Oracle
template with some exceptions.

Dropping of setpcap (present in the Oracle template) is commented out in
the Fedora template.  It seems to cause problems, such as large login
delays with Fedora 20 containers (but not Fedora 19 - strange).

The Fedora template is further modified to disable systemd-journald.service
as it is unnecessary in a container and causes serious problems when
running in a Fedora 20 container.

The Fedora template is also updated to default to Fedora 20 when running
on a non-Fedora host.

Regards,
Mike

Signed-off-by: Michael H. Warfield <mhw@WittsEnd.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>