Context:
Once the event based process mapping is in place (OPT-2722) the process generation can be triggered and monitored using the publishing api.

AT:

• a publishing endpoint is added to the Event Based Process API, e.g. POST /api/eventBasedProcess/:id/_publish
• a cancel publishing endpoint is added to the Event Based Process API, e.g. POST /api/eventBasedProcess/:id/_cancelpublish
• the endpoints Event Based Process By Id & Get all event based processes return:
  • the current state of the event based process 
    • unmapped - mapping is empty and no published state available
    • mapped - mapping contains entries, no published state available
    • publish_pending - once an event based process publish is triggered the process will be in this state till the publish has processed all events till the publish date
    • published - there is a published state and the event based process hasn't been modified since (will not be available in the scope of this task as we need OPT-2982 for this )
    • unpublished_changes - there is a published state and the event based process has been modified since publication
  • the progress of the publishing if in state publish_pending (will not be available in the scope of this task)

Out of scope:
The actual process instance generation/import