Change {Chili => Open}Project::PrincipalAllowanceEvaluator usage

Signed-off-by: Alex Coles <alex@alexbcoles.com>

app/models/user.rb

@@ -229,7 +229,7 @@ class User < Principal
     end
   end
 
-  register_allowance_evaluator ChiliProject::PrincipalAllowanceEvaluator::Default
+  register_allowance_evaluator OpenProject::PrincipalAllowanceEvaluator::Default
 
   # Returns the user that matches provided login and password, or nil
   def self.try_to_login(login, password)