add bus group in sum file and mod file;
bugfix busaux air generated

fix null-reference exception in case a torque converter is used when the engine speed is too high (set deltaEngineSpeed field)

Merge branch 'feature/VECTO-1190-d-m-heavy-busesK' of https://webgate.ec.europa.eu/CITnet/stash/scm/~emkoberfr/vecto-dev into feature/VECTO-1190-declaration-mode-for-heavy-buses

generation of pif, mrf for primary vehicle adapted (remove dict an replace by list of all results; adapt xml schema

adapt driver model: in case of smart bus aux, issue non-dry run request in brake action to set excessive power