Adjust Jenkinsfile for move of releng.aggregator to github Change-Id: Ib97ad7778c3a412c6f8e31e3a87990ace632c482 Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.text/+/190640 Tested-by: Platform Bot <platform-bot@eclipse.org> Reviewed-by: Alexander Kurtakov <akurtako@redhat.com>