Back to docker-compose 1.4.0 into .travis.yml file

Author: Vincent Composieux

.travis.yml

@@ -5,7 +5,7 @@ services:
 
 before_install:
   - mkdir symfony
-  - curl -L https://github.com/docker/compose/releases/download/1.4.2/docker-compose-`uname -s`-`uname -m` > docker-compose
+  - curl -L https://github.com/docker/compose/releases/download/1.4.0/docker-compose-`uname -s`-`uname -m` > docker-compose
   - chmod +x docker-compose
   - sudo mv docker-compose /usr/local/bin