vsphere.rb in rubber-2.6.4

- old
+ new

@@ -135,10 +135,10 @@
             end
           end
 
           instance[:region_id] = item.datacenter
           instance[:provider] = 'vsphere'
-          instance[:platform] = 'linux'
+          instance[:platform] = Rubber::Platforms::LINUX
           instances << instance
         end
 
         return instances
       end
\ No newline at end of file