Try to use container image from DockerHub

.travis.yml

@@ -12,6 +12,10 @@ branches:
   only:
   - btelnes
 
+# command to install dependencies
+# Note: Keep this to avoid "Could not locate requirements.txt.  Override the install: key in your .travis.yml to install dependencies"
+install:
+
 before_install:
   - docker login -u $DOCKER_USERNAME -p $DOCKER_PASSWORD
   - docker pull btelnes/devstack