Create benchmark scenarios script / script aggregate

[LesnyRumcajs]

So far we have a single script to run all benchmarks with some overridable defaults that we need to change by hand. It'd be good to have something official, to be even run overnight.

Some tests I can think of:

1. 1,2,3 CPU, ghz unrestrained, we can see how much each implementation can support + resource usage
2. CPU limit 6, ghz 20,30,40k req/s - we can see resource usage of each implementation given some pre-defined load

Those could be run in 1,5 and 10 minutes periods per suite - to see e.g. Java getting better over time.

[Trisfald]

For 2 we should keep in mind the total req/s in ghz are concurrency * qps. Concurrency defaults to 50.

We can also play with the number of concurrent requests and/or client connections

[Trisfald]

Tracking progress:

• Implement configuration options for qps, concurrent requests and number of connections: add more configuration parameters #80
• Implement multiple bench.sh scenarios