FIX CI

Summary

There were multiple problems that lead to a pipeline crash. The main issue was that entities were multiple times in the exported xml file.

Test Environment

CI/unittest should be fine.

Check List for the Author

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• All automated tests pass
• Reference related Issues
• Up-to-date CHANGELOG.md
• Annotations in code (Gitlab comments)
  • Intent of new code
  • Problems with old code
  • Why this implementation?

Check List for the Reviewer

• I understand the intent of this MR
• All automated tests pass
• Up-to-date CHANGELOG.md
• The test environment setup works and the intended behavior is reproducible in the test environment
• In-code documentation and comments are up-to-date.
• Check: Are there spezifications? Are they satisfied?

For further good practices have a look at our review guidelines.

.docker/Dockerfile

@@ -22,11 +22,11 @@ ADD https://gitlab.com/api/v4/projects/13656973/repository/branches/dev \
    pylib_version.json
 RUN git clone https://gitlab.com/caosdb/caosdb-pylib.git && \
    cd caosdb-pylib && git checkout dev && pip3 install .
+# At least recommonmark 0.6 required.
+RUN pip3 install recommonmark sphinx-rtd-theme
 COPY . /git
 RUN rm -r /git/.git \
     && mv /git/.docker/pycaosdb.ini /git/integrationtests
 RUN cd /git && pip3 install .
 WORKDIR /git/integrationtests
 CMD /wait-for-it.sh caosdb-server:10443 -t 500 -- ./test.sh
-# At least recommonmark 0.6 required.
-RUN pip3 install recommonmark sphinx-rtd-theme