title: ActiveSupport::Deprecation.silenced = true does not works for me?
body: <p>My app was developed using Ruby 1.8.7 and Rails 2.3.11.</p>
  
  <p>I am getting lot of deprecation warning while running 'rake spec'</p>
  
  <pre><code>DEPRECATION WARNING: ActiveSupport::Dependencies.load_paths is deprecated, please use   autoload_paths instead. (called from load_paths at /home/soundarapandian/.rvm/gems/ruby-1.8.7-p352/gems/desert-0.5.2/lib/desert/manager.rb:36)
  DEPRECATION WARNING: ActiveSupport::Dependencies.load_paths is deprecated, please use autoload_paths instead. (called from load_paths at /home/soundarapandian/.rvm/gems/ruby-1.8.7-p352/gems/desert-0.5.2/lib/desert/manager.rb:36)
  DEPRECATION WARNING: ActiveSupport::Dependencies.load_paths is deprecated, please use autoload_paths instead. (called from load_paths at /home/soundarapandian/.rvm/gems/ruby-1.8.7-p352/gems/desert-0.5.2/lib/desert/manager.rb:36)
  DEPRECATION WARNING: ActiveSupport::Dependencies.load_paths is deprecated, please use autoload_paths instead. (called from load_paths at /home/soundarapandian/.rvm/gems/ruby-1.8.7-p352/gems/desert-0.5.2/lib/desert/manager.rb:36)
  config.load_paths is deprecated and removed in Rails 3, please use autoload_paths instead
  config.load_paths= is deprecated and removed in Rails 3, please use autoload_paths= instead
  DEPRECATION WARNING: ActiveSupport::Dependencies.load_paths is deprecated, please use autoload_paths instead. (called from load_paths at /home/soundarapandian/.rvm/gems/ruby-1.8.7-p352/gems/desert-0.5.2/lib/desert/manager.rb:36)
  DEPRECATION WARNING: ActiveSupport::Dependencies.load_paths is deprecated, please use autoload_paths instead. (called from load_paths at /home/soundarapandian/.rvm/gems/ruby-1.8.7-p352/gems/desert-0.5.2/lib/desert/manager.rb:36)
  DEPRECATION WARNING: ActiveSupport::Dependencies.load_paths is deprecated, please use 
  </code></pre>
  
  <p>I have tried adding </p>
  
  <pre><code>ActiveSupport::Deprecation.silenced = true 
  #in config/environments/test.rb
  </code></pre>
  
  <p>But still I am getting the warnings.How can I disable it?</p>
  
  <p>Thank you.</p>