Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -39,4 +39,5 @@ unit-test-job:   # This job runs in the test stage.
   stage: test    # It only starts when the job in the build stage completes successfully.
   script:
     - echo "Running unit tests..."
+    - source ansible/bin/activate
     - ansible-playbook site.yml -b -l localhost