Remove failed / pending charts during cleanup, update release-1.6 charts

Change-Id: Id1c4671a973668db1b03c9b541090c6aaa12c8a4
diff --git a/Makefile b/Makefile
index 50fb387..3e78773 100644
--- a/Makefile
+++ b/Makefile
@@ -340,7 +340,7 @@
 		|| (echo "*** TEST FAILED ***" && exit 1)
 
 cleanup-omec:
-	helm delete -n omec $$(helm -n omec ls -q) || true
+	helm delete -n omec $$(helm -n omec ls -qa) || true
 	@echo ""
 	@echo "Wait for all pods to terminate..."
 	kubectl wait -n omec --for=delete --all=true -l app!=ue pod --timeout=180s || true