Add initial version of the REST api for the job origin component

This change adds stubs for the REST api methods for the job
origin component, including schemas for validation.  As of yet,
there is no actual creation of database objects for job origins.
Names/values in the JSON schemas have been made all lowercase.

Implements: blueprint edp-job-origin-component

Change-Id: I3158e414e3f51fadfe5ba98c534ee241c737a91d
Merge "Add initial version of the REST api for the job origin component"