use docker 1.9.0 on circleci

circle.yml

@@ -1,7 +1,7 @@
 machine:
   pre:
     - echo 'DOCKER_OPTS="-s btrfs -e lxc -D --userland-proxy=false"' | sudo tee -a /etc/default/docker
-    - sudo curl -L -o /usr/bin/docker 'https://s3-external-1.amazonaws.com/circle-downloads/docker-1.8.2-circleci-cp-workaround'
+    - sudo curl -L -o /usr/bin/docker 'https://s3-external-1.amazonaws.com/circle-downloads/docker-1.9.0-circleci'
     - sudo chmod 0755 /usr/bin/docker
   services:
     - docker

tests/ci/parallel_runner.sh

@@ -19,6 +19,7 @@ setup_circle() {
   sudo -E CI=true make -e install
   sudo -E make -e setup-deploy-tests
   make -e ci-dependencies
+  docker version
 }
 
 if [[ -n "$CIRCLE_NODE_INDEX" ]] && [[ "$MODE" == "setup" ]]; then