Wholesale order process adaption: refactorings, new CreditNote and OrderAgreement entity.
TODOs:
- SpecificationIntegrationTest not working
- Adapt GUI
TestDataCreator added for GUI Tests
removed lock file
Merge branch 'master' of https://github.com/Switajski/FlexibleOrders

Conflicts:
	src/test/resources/database.properties
Agreement Grid added to GUI
Defect of not showing pdf-views fixed