Change remaining Ada instructions for python ones
generate-step-A5.sh: etape_b2.py -> etape_b1.py generate-step-C3.sh: Ada -> python instructions generate-step-E4.sh: Modify instructions to fit the way python run
generate-step-A5.sh: etape_b2.py -> etape_b1.py generate-step-C3.sh: Ada -> python instructions generate-step-E4.sh: Modify instructions to fit the way python run