Remove dependencies we don't use anymore.
Make it clearer this is a method call.
Restructure the CanBackOff tests a bit.
Fix the backoff timing on CanBackoff

It was backing off in *milliseconds* not seconds.

It was also sleeping after the last check, a waste.
Change the default number of backoff tries to 3.

That's what everything uses.  If Github can't get their shit together in 1.5 seconds
there is a problem.
Merge branch 'bug/CanBackOff'

Turns out it was delaying in milliseconds, not seconds.  Whoops.