Make docker version on node same as master (openshift#119)

Author: puneetguptanitj

cmd/clusterctl/examples/openstack/ubuntu/provider-components.yaml.template

@@ -166,7 +166,7 @@ data:
             echo "exit 101" > /usr/sbin/policy-rc.d
             chmod +x /usr/sbin/policy-rc.d
             trap "rm /usr/sbin/policy-rc.d" RETURN
-            apt-get install -y docker-engine=1.12.0-0~xenial
+            apt-get install -y docker.io
             echo 'DOCKER_OPTS="--iptables=false --ip-masq=false"' > /etc/default/docker
             systemctl daemon-reload
             systemctl enable docker