Merge pull request #727 in VECTO/vecto-sim from...

Merge pull request #727 in VECTO/vecto-sim from ~EMQUARIMA/vecto-sim:feature/VECTO-864-prevent-vecto-loss-map-extension-to-result-in-negative-torque-loss to develop

* commit 'd31c8aaf':
  removed testcases for VTP cycle validation (no longer used)
  loss-map extension: in case of negative slope for regression line exten loss-map with torque loss of last entry in loss-map
  adding testcase where linear regression leads to negative torque when extrapolating