correct exempted technologies
requested to merge vecto/tug-itna/mq_vecto-sim:bugfix/CodeEU-580_XMLSchema-exemptedTech into amdm2/develop
- remove old testcases for exempted vehicles (v1, v2)
- added new testcases for exempted vehicles v2.4
- cleanup exempted technology string in MRF and CIF
- add assertion to check MRF/CIF exempted technology only contains characters and spaces
- add addtional entry in schema without non-visible character
#closes #580