[1.0]Add integration tests for production-pause-vote-timeout

[linh2931]

Setup:

Use five nodes in an hourglass topology. The center node is a relay node that initially has vote-threads enabled. The other 4 peripheral nodes are:

• node0: Enables block production for producera and has the finalizer key with description of producera. Has vote-threads enabled. Connect to the center node.
• node1: Enables block production for producerb and has the finalizer key with description of producerb. Has vote-threads enabled. Connect to the center node and Node1.
• producercNode: Enables block production for producerc.
• finalizercNode: Has the finalizer key with description of producerc. Has vote-threads enabled. Connect to the center node and producercNode.

Test cases:

1. Bring down finalizercNode. producercNode should eventually automatically pause production due to not receiving votes from finalizercNode. that are associated to its producerc. However, Node0 and Node1 should not pause. Then bring finalizercNode. back up. producercNode should automatically resume production.
2. Bring down the center node. producercNode should eventually automatically pause production due to not receiving votes from Node0 and Node1 that are associated with the other producers. However, Node0 and Node1 should not pause. Then bring the center node back up. producercNode should automatically resume production.
3. Restart producercNode with "--production-pause-vote-timeout-ms 0" to disable production-pause-vote-timeout. Bring down finalizercNode. producercNode should keep producing.

The PR also fixes an issue that the TestHarness's setFinalizers did not use the same threshold formula as the core contract.

Resolves #542

[ericpassmore]

Note:start
group: STABILITY
category: TEST
summary: Adds sophisticated test for production pause scenario.
Note:end