When you define more steps in your plugin, make it clear they come from your plugin
This PR makes sure we respect that guideline in order to avoid conflicts when tests are done on a system that has other plugins installed. (If they respect the guideline, it should not be a problem.)
The developer docs say:
This PR makes sure we respect that guideline in order to avoid conflicts when tests are done on a system that has other plugins installed. (If they respect the guideline, it should not be a problem.)
This fixes #131.