Scalability test for hydrapool setup to test up to 1000 stratum clients

[pool2win]

[pool2win]

We need to run this again with a whole lot of accounting and payout changes.

[adamdecaf]

I threw some hashrate at the test instance today from a few workers and everything seemed to perform well. The best diff was only 2.67G (when I had a bitaxe hit 3.47G), but the test seemed to be a success.