Fix YAML syntax in nova/client/flavor/default.yml

"found character '\t' that cannot start any token"

Change-Id: I5c468226ca537677b6787fbaade977f39a0c9693
diff --git a/nova/client/flavor/default.yml b/nova/client/flavor/default.yml
index 492530d..1d374c5 100644
--- a/nova/client/flavor/default.yml
+++ b/nova/client/flavor/default.yml
@@ -61,4 +61,4 @@
             m1.large100:
               ram: 8096
               disk: 100
-            	vcpus: 4
+              vcpus: 4