add swift-bench
add swift-bench

Change-Id: Ibefb43cebfaf04d990aa95ab62a1b0cd1f9e9f4c

cp16net/reviewstats,cp16net/reviewstats,JohnGarbutt/reviewstats,openstack-infra/reviewstats,JohnGarbutt/reviewstats,openstack-infra/reviewstats