state for this synchronizer.
also reports the SychronizerState on synchonizerStarted notification.
Add tests that verify the state being reported properly
Fix `BlockBatchValidationTests`
`XCAsyncTestCase` does not work as intended but `wait {}` does what
we need.
restored `needsToStartScanningWhenStopped` as a Bool var on actor
fixed Enhancement test
Michal Fousek
Francisco Gindre
Daniel Haight