Add Pytest tests for the davinci script in DaVinciSys

As per our discussion !606 (comment 5084945) in MR !606 (merged), @dfazzini and @pkoppenb. This should be a good starting point I reckon.

Work towards DPA grand task https://gitlab.cern.ch/lhcb-dpa/project/-/issues/179.

added testing label

requested review from @dfazzini

assigned to @pkoppenb

mentioned in merge request !606 (merged)

added 2 commits

• fa69024a - Fixed formatting
• 0309c18e - Remove variable defined but never used - thanks linting for the catch

Compare with previous version

requested review from @pkoppenb

/ci-test

added ci-test-triggered label

• [2021-12-10 17:37] Validation started with lhcb-master-mr#3322

resolved all threads

approved this merge request

approved this merge request

assigned to @erodrigu

Thanks both for the green light to merge.

merged

mentioned in commit d96651a6

mentioned in merge request !609 (merged)

added DPA-WP3 label