apparmor-tracker: Don't run on OSTree images, no Python there

The apparmor-tracker testcases uses the run-aa-test tool, which is written in Python 3. This makes it unsuitable to be run on the OSTree images, since none of them ships Python.

added 2 commits

• aa1a730a - 1 commit from branch apertis/v2020dev0
• 019abb9d - apparmor-tracker: Don't run on OSTree images, no Python there

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merged