Fix sed in CI file

.gitlab-ci.yml

@@ -17,7 +17,7 @@ run_tests:
   script:
     - ping -W1 -c1 mongo
     - mv config.json.example config.json
-    - sed -i -e 's/"debug" : false/"debug" : true/g' config.json
+    - sed -i -e 's/false/true/g' config.json
     - gulp build
     - cd build/
     - mocha