SLING-8288 - Starter builds do not trigger execution of ITs

Manually add upstream projects until JENKINS-53907 is fixed.
diff --git a/.sling-module.json b/.sling-module.json
index 6ccfaab..5ba3268 100644
--- a/.sling-module.json
+++ b/.sling-module.json
@@ -5,6 +5,7 @@
             "**/logs/*.log"
         ],
         "emailRecipients": ["dev@sling.apache.org"],
-        "additionalMavenParams": "-X"
+        "additionalMavenParams": "-X",
+        "upstreamProjects": ["../sling-org-apache-sling-starter/master", "../sling/sling-org-apache-sling-launchpad-test-bundles"]
     }
 }