Sync mcp-virtual-aio model from mcp-virtual-lab repo

This patch syncs mcp-virtual-aio and scripts from mcp-virtual-lab repo

Change-Id: Icf0a9eb44bc0d06e9fffe22bf3eb03b0f29d75c5
diff --git a/classes/cluster/overrides.yml b/classes/cluster/overrides.yml
new file mode 100644
index 0000000..0b36fca
--- /dev/null
+++ b/classes/cluster/overrides.yml
@@ -0,0 +1,2 @@
+# this file is used for dynamic metadata
+# `salt-call reclass.cluster_meta_set foo bar` can be used