Tests: increase some delays slightly

I was getting rare errors where the time diff was close to 100ms,
but just under (99ms) adn thus failing the test. The point of these
tests is to ensure that the wait causes the blocking. Adding a few ms
time buffer in there made the tests more reliable.
Merge add-cmd-wait-for-job (#8) into ifixit-production

Tests: increase some delays slightly

I was getting rare errors where the time diff was close to 100ms,
but just under (99ms) adn thus failing the test. The point of these
tests is to ensure that the wait causes the blocking. Adding a few ms
time buffer in there made the tests more reliable.