BENCH: put in np.random.seed on vbenches

[jreback]

all of the groupby vbenches need a np.random.seed(1234) to make them consistent from run-to-run (where they don't have them now).

Possibly should do this on other benches as well.

[hayd]

Could this just be stuck into pandas_vb_common ?

[jreback]

yes that should work
should remove any of the other ones
and test that it stays reasonably stable run to run

[jtratner]

👍

[RafalSkolasinski]

I am working on that now

[RafalSkolasinski]

Ok, that looks like already taken care of. There is np.random.seed(1234) on vbanches and also new asv_banches.

[jreback]

need to remove any randoms from existing benchmarks, and ensure that they still run. E.g. we always want to use a single seed for the entire run (unless for some reason a benchmark uses a very specific seed)