WIP: Don't use tox in unittests

.gitlab-ci.yml

@@ -61,13 +61,9 @@ unittest_py3.8:
   image: python:3.8
   script: &python_test_script
     - touch ~/.pycaosdb.ini
-    - cd unittests/docker
-    - cp sources.list.local /etc/apt/
-    - mv /etc/apt/sources.list /etc/apt/sources.list.orig
-    - cat /etc/apt/sources.list.local /etc/apt/sources.list.orig > /etc/apt/sources.list
-    - apt-get update && apt-get install -y tox
-    - cd ../..
-    - make unittest
+    - pip install pytest
+    - pip install .
+    - python -m pytest unittests
 
 # Trigger building of server image and integration tests
 trigger_build: