Validate the fallback scripts CI output using grep and stem

Or we could write a test python script that runs the other scripts and checks their output.

changed milestone to %Tor: 0.4.5.x-final

added component::core tor/fallback scripts fallback fallback-ci milestone::Tor: 0.4.5.x-final priority::medium severity::normal status::new type::enhancement labels

We need to implement these tests in 2019, so that we can make sure our python 3 changes actually work.

Trac:
Keywords: N/A deleted, 043-must added
Parent: #28797 (moved) to #28863 (moved)

Trac:
Parent: #28863 (moved) to N/A

Trac:
Keywords: 043-must deleted, 044-should added

Trac:
Milestone: N/A to Tor: 0.4.5.x-final
Keywords: 044-should deleted, N/A added

moved to tpo/core/fallback-scripts#31020