Sync external_ids from create

otherwise, bridges require 2 Puppet runs to be
fully in sync.

lib/puppet/provider/vs_bridge/ovs.rb

@@ -11,6 +11,7 @@ Puppet::Type.type(:vs_bridge).provide(:ovs) do
 
   def create
     vsctl("add-br", @resource[:name])
+    external_ids = @resource[:external_ids] if@resource[:external_ids]
   end
 
   def destroy