BZ #1054181 - Set OS description consistently, install LSB

OS descriptions are filled in by LSB, which relies on lsb_release (supplied by
redhat-lsb-core).  On RHEL, they usually contain the variant string "Server",
so also update the description we preset to match that supplied by lsb_release.
Merge pull request #104 from domcleal/1054181-branding

BZ #1054181 - Set OS description consistently, install LSB
Added $controller_admin_host to support admin endpoints
Merge pull request #85 from gildub/admin-endpoints

Added $controller_admin_host to support admin endpoints
BZ #1049633 - Foreman should support VXLAN

https://bugzilla.redhat.com/show_bug.cgi?id=1049633

There are 2 new parameters needed by puppet-neutron for ovs agent/plugin support
for vxlan.  This patch adds those and opens the specified udp port on the
firewall.