Fixed gitlab-ci

.gitlab-ci.yml

 before_script:
-- export PATH="/builds/miniconda3/bin:$PATH"
+- apt-get install virtualenv python3 build-essential
+- virtualenv -p /usr/bin/python3 python3
+- . ~/python3/bin/activate
+- pip install mock
 
 test-2016-11-17:
   script: