Build with local not yet published release tar.gz

Created using: git archive --format=tgz --prefix=icinga2-2.11.10/ v2.11.10

.gitlab-ci.yml

@@ -8,6 +8,7 @@ variables:
   DOCKER_IMAGE_BASE: registry.icinga.com/build-docker
   #ICINGA_BUILD_RELEASE_TYPE: testing
   ICINGA_BUILD_TYPE: release
+  CI_SKIP_USCAN: 'yes'
 
 .source: &source
   stage: source