Remove /benches and /testnet folders

[defuz]

Does anyone remember why these folders exist? I would like to delete them.

@vldm Perhaps these pieces can be useful for deploying a test net, but I would still prefer to remove it in the current form.

cc @alekseysidorov @asmsoft @vldm

[vldm]

In profiling I used testnet, and this folder was removed in parallel merge.
So I propose move profiling to different repository. And keep testnet in it.
May be tx-generator, testnet, benches (modified one), profiling should be merged into separate sanity repository.

[therustmonk]

I've planned to repair testnet in: exonum/cryptocurrency#30
If we keep the same stuff here (testnet) we can unify supervisord config.

[vldm]

@deniskolodin +1 supervisord config should be in cryptocurrency.

[dj8yfo]

@vldm it appears we can try tune leveldb cache a bit https://github.com/bitcoin/bitcoin/blob/master/src/leveldb/doc/benchmark.html#L373.
I beleive we are using the defaults of leveldb::options::Options

[dj8yfo]

@defuz, is it Tx generator, running benchmarks or just Remove /benches and /testnet folders ?
What road to follow?

[stanislav-tkach]

#189