Update mirror-image

  * Allign to offline-build example

Change-Id: I96448007b75ef98dd8f658b0be14c0b56c8117ba
diff --git a/.gitignore b/.gitignore
index 336d238..4ae6f8b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 images/
 packer_cache/
+*/config-drive/cloudata.iso