fix wrong jO names for VH, Hltau [skip modfiles]

Jan Kretzschmarrequested to merge
jk_patchVHlt into master

Description of bug

jO misnamed in ATLMCPROD-9810 - "aMCH7" but using Pythia8 in fact

Changes introduced

renamed jOs

Tests

Issues resolved

Closes #

Merge request reports