BFT synchronizer: integration test against an orderer that does block censorship

[arkadiPiven]

TEST update

• Run a 4 orderer smart bft cluster.
• Do 10 TXs.
• Shut down o4.
• Do 10 more TXs.
• Shutdown o1,o2,o3
• Prepares 3 orderer mocks with 20 TXs, with the addresses of o1,o2,o3
• Emulates block censorship
• Start o4
• O4 should detects the block censorship attempt and get all 20 blocks to its ledger

Related issues

BFT synchronizer: integration test against an orderer that does block censorship #4731