[enh] Ecomode improvements

Several changes for the ecomode MR: !1214 (closed)

cc @librelois

added 2 commits

• 6959f9f1 - [enh] Put constants in a ProverConstants
• 93c5b747 - [enh] Eco mode should not be by default

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changed title from [enh] Improve ecomode unit test + fix workers to [enh] Ecomode improvements

changed the description

mentioned in merge request !1214 (closed)

Okay, the new test works at my home, I validate. @vincentrou you can merge if it's good for you :)

mentioned in commit d19e76bf

merged