Travis Update to Docker 17.03.0

update_docker.sh

#!/usr/bin/env bash
set -euo pipefail

echo "Installing docker engine"

sudo sh -c 'echo "deb https://apt.dockerproject.org/repo ubuntu-$(lsb_release -cs) main" > /etc/apt/sources.list.d/docker.list'
curl -fsSL https://apt.dockerproject.org/gpg | sudo apt-key add -
sudo apt-key fingerprint 58118E89F3A912897C070ADBF76221572C52609D
sudo apt-get update
sudo apt-get -y install "docker-engine=17.03.0~ce-0~ubuntu-$(lsb_release -cs)"

echo "Installing docker-composer"

curl -L -o /tmp/docker-compose https://github.com/docker/compose/releases/download/1.12.0-rc1/docker-compose-`uname -s`-`uname -m`
sudo mv /tmp/docker-compose /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose