Use the gitlab relative url schema

.gitlab-ci.yml

@@ -15,9 +15,6 @@ test:
   before_script:
     - pip install pipenv
     - pipenv install -d
-    - cd recircle
-    - git submodule update --remote
-    - cd ..
   script:
   - cd recircle
   - pipenv run python manage.py test

.gitmodules

 [submodule "recircle/interface_openstack"]
 	path = recircle/interface_openstack
-	url = https://git.ik.bme.hu/RECIRCLE/interface-openstack
+	url = ../../RECIRCLE/interface-openstack
 	branch = DEV

interface_openstack @ e01d873c

-Subproject commit dc7e976d672c15d4f2f771d9a1fad0459d133f61
+Subproject commit e01d873c78ac17fed0438936f979de3cbaca6a5e