Check quorum per each reduction step on agreement message verification

[goshawk-3]

Describe the bug
Currently, quorum check is based a sum of all voters.

Expected behaviour
Agreement verification should ensure quorum threshold is reached for both reduction steps.

Logs

total_votes of step:3 should be 11 but not "total_votes":23

{"bitset":479,"event":"agreement_received","hash":"62b29d1a45...f42c463eef","level":"info","msg":"","process":"consensus","round":237998,"step":2,"time":"2022-04-13T10:07:22Z","total_votes":12,"voted_len":8}
{"bitset":371,"event":"agreement_received","hash":"62b29d1a45...f42c463eef","level":"info","msg":"","process":"consensus","round":237998,"step":3,"time":"2022-04-13T10:07:22Z","total_votes":23,"voted_len":6}