Adding Quagga to build

Adding Quagga to build

Builds 6Wind ZRPC, Quagga, and dependencies required for OpenDaylight
with BGPVPN scenario.  Packages are built into RPMs, and left on the
overcloud disk in /root/quagga.  They are then installed at deploy time
if VPN feature flag is enabled.  Note, for proper upstream we should
create a zrpc OOO service, but that can be a follow up patch.  For that
we would also need official packaging/build system upstream somewhere.

JIRA: APEX-357

Changes Include:
 - Build thrift rpm
 - Build c-capnproto rpm
 - Build quagga rpm
 - Build zrpcd rpm
 - Configure bgpd
 - Detect deploy with VPN and install pkgs
 - Enable zrpcd with systemd

Change-Id: I9825694f46aaab48a3d1cd5fc4d9a24c7370e8fa
Signed-off-by: Tim Rozet <trozet@redhat.com>
Signed-off-by: Nikolas Hermanns <nikolas.hermanns@ericsson.com>
Signed-off-by: Romanos Skiadas <rski@intracom-telecom.com>