Trigger check-release-date at the end of nuxeo-hf

The check-release-date job hold the release validation process when a blocker ticket is expected to be present in the next release. It also checks if the docker images are present and recent.

These two checks are interesting to be checked again just after the nuxeo-hf job. Indeed, as this job is triggered after a build of nuxeo-lts reference branch, so at this moment blocker fixes could be in the latest version, and all docker images are been built.

It would be interesting to add a trigger of check-release-date job from nuxeo-hf job to check that we can start validation process. This would avoid to manually trigger it or wait for the next day.