FIX: Trying to fix CI...

.gitlab-ci.yml

 before_script:
-    - echo "deb http://ftp.us.debian.org/debian unstable main contrib non-free" > /etc/apt/sources.list.d/unstable.list
     - apt-get update
     - apt-get install -y -qq make cmake libboost-test-dev gem 
     - apt-get install -t testing gcc-7