make more testcases work

refactor bus aux heating: return heating demand for all heating sources
add testcases for mod-data postprocessing and FC-correction of busaux heating

extended testcases,
startet implementation of DeclarationModeHeavyLorryRunDataFactory.Conventional

bugfix IEPC component with standard values: require gear attribute, allow mulitple power maps (and drag curves)

adapting CIF completed buses (schema, output)
renaming ResultDataSignature to ManufacturerRecordSignature

correcting typo in xml type name,
adapting xample XML files, testfiles
always write retarder (where possible), only write retarder type in MRF, VIF contains info about retarder (manufacturer, model, ...)
writing values in correct units (IEPC, EM) to MRF, VIF
adding certification method to battery, supercap, EM,
removing busaux pneumatic system elements for PEV, correcting output for pneumatic system technology PEV,
adding type info in schema
correcting results: no CO2 in VIF results, average passenger count in CIF summary

refactoring/adapting writing CIF of completed bus - report contains more information about primary vehicle

adding more testcases for buses, writing input data signature to MRF and CIF, bugfix dual fuel output, bugfix vehicle group output