This change adds an "interface" map to the API for job creation, such that
the operator registering a job can define a unified, human-readable way to
pass in all arguments, parameters, and configurations that the execution
of that job may require or accept. This will allow platform-agnostic
wizarding at the job execution phase and allows users to document use of
their own jobs once in a persistent, standardized format.
Change-Id: I59b9b679a650361ddcd30975891496fdfbabb93c
Partially Implements: blueprint unified-job-interface-map
b2c01f5d13