Adjust Jenkinsfile for move of releng.aggregator to github

Change-Id: Ib80d16feaf771a574188308aa8798dba56ce6f53
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.ua/+/190637
Tested-by: Platform Bot <platform-bot@eclipse.org>
1 file changed