Adjust Jenkinsfile for move of releng.aggregator to github

Change-Id: I02090024c071178626a4c790a46231c385cc12c9
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
Reviewed-on: https://git.eclipse.org/r/c/equinox/rt.equinox.bundles/+/190628
Tested-by: Equinox Bot <equinox-bot@eclipse.org>
1 file changed