Add its-jira configuration to the new PolyGerrit UI

This change adds the missing configuration fields for its-jira for
Gerrit 2.16. The uploadvalidator plugin was used as an example to come
up with the new files which add the configuration to the new PolyGerrit
UI.

Feature: Issue 11319
Change-Id: I87c9da2838ac0ff0202a06b07a3dc446eafff25b
5 files changed