Restructure of openDS datamodels and new versions

[samleeflang]

Ok massive changes.

• All folder names to singular (before it was inconsistent)
• Version has moved a level down, this way we can have a version for each type and not for all types together
• Datamodel changes for:
  • Source system
  • Mapping
  • Machine Annotation Service
  • Annotations
• Captured and changed datamodel of:
  • CreateUpdateTombstone Event
• Update Dockerfile to include lastest endpoint