tiny refactor: use ${CONTAINER_IFNAME} for name construction
tiny refactor: use ${CONTAINER_IFNAME} for name construction

dpw/weave,paulbellamy/weave,n054/weave,n054/weave,paulbellamy/weave,paulbellamy/weave,dpw/weave,weaveworks/weave,n054/weave,weaveworks/weave,dpw/weave,n054/weave,n054/weave,weaveworks/weave,weaveworks/weave,dpw/weave,dpw/weave,paulbellamy/weave