Run docker image on Jenkins do unit test

1. Install Jenkins on Ubuntu 14.04
   https://wiki.jenkins-ci.org/display/JENKINS/Installing+Jenkins+on+Ubuntu

2. Install Docker
   https://docs.docker.com/engine/installation/linux/ubuntulinux/#/prerequisites-by-ubuntu-version
   

   

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3. Include Jenkins user to docker

//Add the docker group if it doesn't already exist.
sudo groupadd docker
//Add the connected user "${USERNAME}" to the docker group.
sudo gpasswd -a ${USER} docker
sudo usermod -aG docker jenkins