Add a simple script for generating large CSV files
Add a simple script for generating large CSV files

We need large CSV files to performance and torture test 'pstore import' so add
a Python script that generates a large time series that mimics real life data.

Signed-off-by: Pekka Enberg <add4fcd06328a394f0ad91feda7ee057316dc5ed@cs.helsinki.fi>

penberg/pstore,penberg/pstore,penberg/pstore,penberg/pstore