add outdated warning

Change-Id: I41523e781c39db42c4be9323dad430f8b4161971
diff --git a/mk-maaas-deploy-pipeline.groovy b/mk-maaas-deploy-pipeline.groovy
index f0218ac..4142cec 100644
--- a/mk-maaas-deploy-pipeline.groovy
+++ b/mk-maaas-deploy-pipeline.groovy
@@ -1,4 +1,5 @@
 /**
+ * DO NOT USE THIS OUTDATED PIPELINE - add your steps to mk-lab-pipeline
  *
  * Launch heat stack with MAAS lab
  *