tsc imports script modules from strange locations

[behrisch]

the tests import from files which are installed in the repo root

[behrisch]

This seems to be harder than anticipated. The root dir of the repo is always at the begin of sys.path if you start tsc_main.py so if the user decides to run install_scenario_templates.py right there (which is currently encouraged by the docs) the import of the user installed scenario_templates will always come before the scenario_templates of the test. I see hree options:

• move the python scripts to a src dir such that the repo root dir is not automatically added to sys.path
  • con: violates repo structure assumptions for python projects
  • pro: gives better separation of code and data
• use a different name for the scenario_template dir in the tests
  • con: introduces an artificial difference between test environment and "production"
  • pro: easily done
• insert an entry at the front of sys.path when modifying it in tsc_main
  • con: may not help at all if there is no scripting module
  • pro: is a one-liner