Add P2P QA test case to check block, transaction and signature message rebound count

[jondubois]

Expected behavior

There needs to be a QA test case to check how many times a message bounces back to a node due to propagation.

Each node should only propagate blocks, transactions and signatures which they haven't already processed. Now that the 2.3 network is a partial mesh, we should be getting fewer rebound messages than we did in previous versions (which formed a full mesh network). Knowing this metric should help us to better evaluate future implementations which affect the bandwidth consumption of the network.

Actual behavior

There are no test cases to measure the average rebound rate of messages (for each node) as part of QA.

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

2.3