Use Shipyard devel image
Since we moved to tag only the stable releases 'latest', we now need
to use the 'devel' tag to get the cutting edge Shipyard image.
-FROM quay.io/submariner/shipyard-dapper-base
+FROM quay.io/submariner/shipyard-dapper-base:devel
ENV DAPPER_ENV="REPO TAG QUAY_USERNAME QUAY_PASSWORD GITHUB_SHA CLUSTERS_ARGS DEPLOY_ARGS IMAGES_ARGS RELEASE_ARGS" \
DAPPER_SOURCE=/go/src/github.com/submariner-io/submariner DAPPER_DOCKER_SOCKET=true
