[Docker] install pytest-parallel

docker/Dockerfile.finn_ci

@@ -62,6 +62,7 @@ RUN pip install -r /workspace/finn/requirements.txt
 RUN apt update; apt install nano
 RUN pip install pytest-dependency
 RUN pip install pytest-xdist
+RUN pip install pytest-parallel
 
 ENV PYTHONPATH "${PYTHONPATH}:/workspace/finn/src"
 ENV PYTHONPATH "${PYTHONPATH}:/workspace/pyverilator"

docker/Dockerfile.finn_dev

@@ -56,6 +56,7 @@ RUN pip install pytest-dependency
 RUN pip install sphinx
 RUN pip install sphinx_rtd_theme
 RUN pip install pytest-xdist
+RUN pip install pytest-parallel
 
 # switch user
 RUN groupadd -g $GID $GNAME