importing a pipeline not working

to support the import of existing pipelines, a new onboarding service-endpoint has been created for that:

https://gitlab.eclipse.org/eclipse/graphene/onboarding/-/blob/main/onboarding-common/src/main/java/org/acumos/onboarding/services/impl/OnboardingController.java#L648

it basically takes the proto file, the docker-image URI, blueprint, cdump and license and puts them unchanged into the databases.