First, the example package install command neglected to include any of
the package names, so this patch adds the correct package names as well
as omits the non-essential, personal-preference command flags so as to
be consistent with the examples in the main OpenStack install guide.
Second, like the barbican packages in RDO, the OBS barbican packages do
not include an openstack-barbican-api systemd unit file and instead
provide an Apache vhost sample file, so this patch modifies the service
instructions to configure the service with Apache.
Change-Id: I13bfeef4f06602984d2ffb727212ab6d39797401
7df3342e35