Update docker on travis using sudo (#616)

.travis.yml

@@ -3,30 +3,18 @@ sudo: true                  # Required to install packages
 services: 
     - docker
 
-env:
-    global:
-        - DOCKER_VERSION=1.10.3  # Install Docker version 1.10.3
-        - DOCKER_COMPOSE_VERSION=1.7.1
-        - DOCKER_VERSION=get.docker.com  # Install Docker using get.docker.com (may break)
-
-        - BRANCH=stable         # Use 'stable' branch
-        - BRANCH=develop        # Use 'develop' branch
-
-        - QUIET=1               # Less verbose logging
-        - UML_FIG=0             # Don't install fig
-        - UML_DOCKERCOMPOSE=1   # Install docker-compose
-
-    install:
-        # Install https://github.com/moul/travis-docker toolchain
-        #   - curl -sLo - http://j.mp/install-travis-docker | sh -xe
 before_install:
+    - sudo sh -c 'echo "deb https://apt.dockerproject.org/repo ubuntu-precise main" > /etc/apt/sources.list.d/docker.list'
+    - sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
+    - sudo apt-get update
+    - sudo apt-key update
+    - sudo apt-get -qqy -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" install docker-engine=1.11.1-0~precise
     - sudo rm /usr/local/bin/docker-compose
-    - curl -L https://github.com/docker/compose/releases/download/${DOCKER_COMPOSE_VERSION}/docker-compose-`uname -s`-`uname -m` > docker-compose
+    - curl -L https://github.com/docker/compose/releases/download/1.7.1/docker-compose-`uname -s`-`uname -m` > docker-compose
     - chmod +x docker-compose
     - sudo mv docker-compose /usr/local/bin
-    - docker-compose build
-    - docker-compose up -d
-
+    - docker-compose -v
+    - docker -v
 script:
     - docker-wait opensourcepos_php_1