Fix confusing coverage script behavior ignoring some errors

We would prefer to have the coverage report generated in all cases
and the problems with coverage in the bash script are not reproducible
in other environments so let's prioritize the coverage data first.

tests/coverage_analysis.sh

@@ -11,5 +11,5 @@ $coverage run --source="$libpath" -m unittest discover -v -s ../tests/
 $coverage report -m -i
 # codecov is poorly documented and even in verbose mode and various directory changes
 # won't tell us where it runs the xml command and why it ends up not finding it
-$coverage xml
+$coverage xml -i
 if [[ $submit == 1 ]]; then codecov; fi