Add check to forbid different jO name from the one that is expected

Changes introduced

Check that jO name is as expected from the generator names printed in the metadata

To avoid !3561 (closed)

Tests

Wrong name: mc.Py8EG_Tchan2EJs_Ld10_rho20_pi5_Xd600_l5.py

Correct name: mc.MGPy8EG_Tchan2EJs_Ld10_rho20_pi5_Xd600_l5.py

Issues resolved

Closes #