Do not trigger post-submit-test-cascade-heavy if package build failed

... to avoid package builds during tests allocating executors waiting
for a package build to complete

Change-Id: I5ae40d9d5f08e539c97fc8881a1818df73b44db7
(cherry picked from commit aab4393)

Author: JonasScharpf

buildscripts/scripts/trigger-build-upload-cmk-distro-package.groovy

@@ -104,7 +104,7 @@ def main() {
 
     smart_stage(
         name: "Trigger trigger-post-submit-test-cascade-heavy",
-        condition: trigger_post_submit_heavy_chain,
+        condition: trigger_post_submit_heavy_chain && currentBuild.result == "SUCCESS",
     ) {
         build(
             job: "${branch_base_folder}/trigger-post-submit-test-cascade-heavy",