Separate datasets from MLChallenge

[pvk-developer]

• BTB version: 3.11
• Python version: 3.6
• Operating System: Ubuntu 20.04

Description

We want to separate the datasets list from MLChallenge in order to keep everyting more organized.
Additionally, ensure that we have the OpenML 100 datasets and create a separated list for them.

Proposal

Create a datasets.py module in benchmark/btb_benchmark/challenges/.
Create two lists inside:

1. One that contains all the datasets sorted by execution time, slowest first.
2. One that contains the OpenML 100 datasets

Then create a function that returns one of those collections.

[pvk-developer]

Solved at #204