[PAN-2369] RunnerTest fail on Windows due to network startup timing issue

[ekellstrand]

PR description

PAN-2369 RunnerTest fail on Windows due to network startup timing issue

• Forces RunnerTest to wait for the P2PNetwork to start and actually configure it's ports before asking for them.
• Re-Enables RunnerTest.fullSyncFromGenesis()
• Re-Enables RunnerTest.fastSyncFromGenesis()

Fixed Issue(s)

PAN-2369

[ajsutton]

LGTM. I'd be tempted to wait something more like 20 seconds because I'm always amazed at how slow things can be when running tests...

[ekellstrand]

In this case, slow is fine. The timing issue only seems to happen on fast boxes with lots of cores. And in my case, it was reliably only a couple of ms required. However, I'm not opposed to 20 sec, to that'll be coming right up.