[UT] CrossDisciplinary_1 example unit test files

[michelangelo-acca]

IFC4.3 Unit test

SimpleProjectBreakdown_1

Example files generated for the Cross Disciplinary scenario.

Further information in README.md file.

Review requested

• IfcFacility
• IfcRoad
• IfcBridge
• IfcRailway
• IfcFacilityPart
• IfcRelInterferesElements

[pjanck]

We're moving to the new repository: https://github.com/bSI-InfraRoom/IFC-infra-unit-test

Please open a new pull request there and close this one.