[ci] allow setting `--cov` per test script

.ci/gitlab/common_test_setup.bash

@@ -32,9 +32,10 @@ export PYTHONHASHSEED=0
 python -c "from matplotlib import pyplot" || true
 
 PYMOR_VERSION=$(python -c 'import pymor;print(pymor.__version__)')
+COV_OPTION=${COV_OPTION:---cov=}
 # `--cov-report=` suppresses terminal output
 COMMON_PYTEST_OPTS="--junitxml=test_results_${PYMOR_VERSION}.xml \
-  --cov-report= --cov --cov-config=setup.cfg --cov-context=test \
+  --cov-report= --cov-config=${PYMOR_ROOT}/setup.cfg --cov-context=test \
   --hypothesis-profile ${PYMOR_HYPOTHESIS_PROFILE} ${PYMOR_PYTEST_EXTRA}"
 
 pytest src/pymortests/docker_ci_smoketest.py
\ No newline at end of file

.ci/gitlab/test_tutorials.bash

 #!/bin/bash
 
 THIS_DIR="$(cd "$(dirname ${BASH_SOURCE[0]})" ; pwd -P )"
+COV_OPTION="--nb-coverage"
 source ${THIS_DIR}/common_test_setup.bash
 
 for fn in ${PYMOR_ROOT}/docs/source/tutorial*md ; do