Explicitly install redis-server when building test container (#410)
Explicitly install redis-server when building test container (#410)

* Explicitly install redis-server when building test container

* Merge into layer

ucbrise/clipper,dcrankshaw/clipper,ucbrise/clipper,dcrankshaw/clipper,ucbrise/clipper,dcrankshaw/clipper,ucbrise/clipper,dcrankshaw/clipper,dcrankshaw/clipper,ucbrise/clipper,ucbrise/clipper