Introduce a new test pipeline for Nuxeo JSF UI.
This pipeline will:
- be built after the Nuxeo Server master build (downstream).
- launch the latest Nuxeo Server build (11.x Docker tag) with the latest promoted Nuxeo JSF UI package installed on it at runtime (using NUXEO_PACKAGES env variable).
- run all the Nuxeo JSF UI functional tests (from the latest promoted tag) against this server to validate the latest promoted package is still working on a more recent Nuxeo Server version.
- notify in Slack if there is any failing test.