Network module should ignore peers for consensus while sycing to network

[ManuGowda]

Expected behavior

Network module should consider <= 100 peers with matching broadhash for consensus calculation.

Actual behavior

When a group of peers are syncing to network and not reached the network height, when a forging node takes these peers for consensus calculation it results in low consensus due to sycing and miss match braodhash, this results in delegate missing a block.

Steps to reproduce

1. Deploy a network of 10 nodes
2. Enable 101 delegates forging on 10 nodes
3. After reaching certain height, Deploy 100 nodes, you can observe the delegates starts to miss forging blocks due to low consensus

Which version(s) does this affect? (Environment, OS, etc...)

2.0.0

[shuse2]

Consensus is calculated in the chain module, and also consensus calculation does support this scenario.