Fixed the uaa config file to match uaa code changes in

preparation for public key signing of tokens.

Change-Id: I8bcedec23216ce77e3aa0f9738348927a80de087

dev_setup/cookbooks/uaa/templates/default/uaa.yml.erb

@@ -20,7 +20,8 @@ cloud_controller:
 
 jwt:
   token:
-    key: <%= node[:uaa][:jwt_secret] %>
+    signing-key: <%= node[:uaa][:jwt_secret] %>
+    verification-key: <%= node[:uaa][:jwt_secret] %>
 
 batch:
   username: <%= node[:uaa][:batch][:username] %>