Preparing v2 API for image service.

[Gerrit91]

Decouples the v1/image API from our image service logic to prepare for a v2 API.

• Move restful service defs including request and response handling into v1/services
• Moves the integration tests already
• Also needs to temporarily duplicate some shared package functions

All the other services need to be migrated in this fashion, then we can build a V2 API that includes all our learnings (e.g. no zapup, better error handling, different auth mechanisms, auditing, resource scoping, ...).