Add 6Wind quagga to ubuntu16.04 and centos7 images

Add 6Wind quagga to ubuntu16.04 and centos7 images

6Wind Quagga router is Open Sourced and can be compiled in two modes
(namely 'l3vpn mode' and 'evpn mode) resulting in separate binaries
required to be installed on minion images. Both binaries are required
for Boron & Carbon DC-Gateway testing. L3VPN Quagga binary is needed
for Boron and EVPN Quagga binary is required for Carbon testing.

- https://lists.opendaylight.org/pipermail/integration-dev/
2017-March/009376.html

Change-Id: Ibfe5b941ea2f31731ad10fbafa54daeb66f18878
Signed-off-by: rahul.agarwal <rahul.agarwal3@tcs.com>
Signed-off-by: Anil Belur <abelur@linuxfoundation.org>