to 1 to avoid tricky edge cases around 0.
Enables testing HealthManager from an external process, primarily by stubbing out time to allow the testing process to fast forward HM's clock. Also involves making async desired_state http requests synchronous in the blackbox testing mode
…n instance so instance mismatches will get cleaned up [finishes #52889677]
… which instance GUID is actually alive.
…e the correct keys