Updated vagrant box, ubuntu/vivid64 was remove from atlas.hasicorp.com
Updated vagrant box, ubuntu/vivid64 was remove from atlas.hasicorp.com

Signed-off-by: Ty Alexander <15a83036d18163999c8fe5b206d58021f37e332a@sendgrid.com>

kolyshkin/libnetwork,docker/libnetwork,abhi/libnetwork,WeiZhang555/libnetwork,mYmNeo/libnetwork,fcrisciani/libnetwork,curtiszimmerman/libnetwork,vdemeester/libnetwork,tmakita/libnetwork,mahak/libnetwork,docker/libnetwork,docker/libnetwork,vdemeester/libnetwork,tmakita/libnetwork,mYmNeo/libnetwork,WeiZhang555/libnetwork,sainath14/libnetwork,kolyshkin/libnetwork,medallia/libnetwork,vdemeester/libnetwork,allencloud/libnetwork,medallia/libnetwork,sainath14/libnetwork,abhi/libnetwork,kolyshkin/libnetwork,msabansal/libnetwork,allencloud/libnetwork,abhi/libnetwork,medallia/libnetwork,mahak/libnetwork,mbanikazemi/libnetwork,mahak/libnetwork,curtiszimmerman/libnetwork,ityangchen/libnetwork,msabansal/libnetwork,mbanikazemi/libnetwork,fcrisciani/libnetwork,ityangchen/libnetwork