bug in hotstuff consensus latency logic

[namn-grg]

Consensus latency for the hotstuff sometimes comes out to be negative which is not possible

and the other times the value is very less - between 1-5ms which also should not be the case

[namn-grg]

2 bugs identified -

1. Logs of 2 diff nodes have time difference. If a block is created in node-0 and committed in node-1 then the logs of node-1 shows the committed time before the creation time in node-0
2. Sometimes the hash comes out to be the same. Discussed with Alberto he said - the hash in the logs is partial and not the full hash so there are chances