PIPELINE: Remove tox from test setup

.docker/Dockerfile

@@ -11,6 +11,7 @@ RUN apt-get update && \
 ARG PYLIB
 RUN echo "PYLIB=${PYLIB}"
 COPY .docker/wait-for-it.sh /wait-for-it.sh
+RUN pip install -r requirements.txt
 ADD https://gitlab.indiscale.com/api/v4/projects/97/repository/commits/${PYLIB} \
     pylib_version.json
 RUN git clone https://gitlab.indiscale.com/caosdb/src/caosdb-pylib.git && \
@@ -31,4 +32,4 @@ CMD /wait-for-it.sh caosdb-server:10443 -t 500 -- \
     cp /git/.docker/sss_pylinkahead.ini /scripting/home/.pylinkahead.ini && \
     cp -r /git/resources /scripting/bin-debug && \
     # ... and run tests
-    tox
+    pytest --cov=linkahead -vv {posargs}

requirements.txt

+jsonschema
 linkahead
 pytest
+pytest-cov
+python-dateutil
+setuptools