Add DOCKER_OLDER_THAN_DAYS parameter

Related: PRODX-40270
Change-Id: Idfd0102c2e59ebe54af9c5536dc5aaed651aca97
diff --git a/src/com/mirantis/mk/KaasUtils.groovy b/src/com/mirantis/mk/KaasUtils.groovy
index 5540039..545aa4c 100644
--- a/src/com/mirantis/mk/KaasUtils.groovy
+++ b/src/com/mirantis/mk/KaasUtils.groovy
@@ -1555,6 +1555,7 @@
         'DESTINATION_REGISTRY_TYPE': '-dst-repo-type',
         'SIGNED_IMAGES_PATH': '-signed-images-path',
         'DOCKER_CLEAN': '-cleanup',
+        'DOCKER_OLDER_THAN_DAYS': '-older-than-days',
         'DOCKER_REPO_PREFIX': '-docker-repo-prefix',
         'DOCKER_TAG': '-docker-tag',
         'FORCE': '-force',