Agree Faster

[cyanial]

Leader should send heartbeat when the upper services call rf.Start() method. This way we can agree on the new log entry without waiting for the next heartbeat sent interval (100ms here).

But it seems that when the leader send heartbeat too fast it will crash and stop to work. So the next tests will fail if we try serval times with the args -count n in Go.

Failed Tests:

TestConcurrentStarts2B