Remove --format flag from add command

    due to changes in keystone v3

lib/cct/commands/openstack.rb

@@ -86,7 +86,7 @@ def create name, options={}
         def add name, options={}
           params.clear
           yield params
-          all_params = ["add", name, "--format=shell"].concat(params.extract!(options))
+          all_params = ["add", name].concat(params.extract!(options))
           OpenStruct.new(shell_parse(exec!(all_params).output))
         end