WIP: PythonInterpreter: always output import errors

Necessary to get the log on the buildbots.
Status Job ID Name Coverage
  External
passed cdash

failed ghostflow-branch-check-master

failed ghostflow-commit-check

failed smtk@master-kerbin-windows-shared-release+superbuild

failed smtk@master-praxis-windows-shared-release+superbuild

failed smtk@master-kerbin-windows-shared-release+superbuild

failed smtk@master-kerbin-windows-shared-release+superbuild

failed smtk@master-kerbin-windows-shared-release+superbuild

failed smtk@master-kerbin-windows-shared-release+superbuild

failed smtk@master-kerbin-windows-shared-release+superbuild

failed smtk@master-praxis-windows-shared-release+superbuild

failed smtk@master-praxis-windows-shared-release+superbuild

failed smtk@master-praxis-windows-shared-release+superbuild

failed smtk@master-praxis-windows-shared-release+superbuild

failed smtk@master-praxis-windows-shared-release+superbuild