title: Can't display "flavors" interface in OpenStack Horizon Dashboard
body: <p>After installing in a Ubuntu Server 13 Machine Several Openstack modules (Keystone, Glance, Nova, Neutron) I've installed Horizon.</p>
  
  <p>I can log with no problem as an admin, display every menu but not the vm flavors menu.</p>
  
  <p>After enabling Debugging in the django config I get this error :</p>
  
  <pre><code>TypeError at /admin/flavors/
  
  list() got an unexpected keyword argument 'is_public'
  
  Request Method:     GET
  Request URL:    http://192.168.211.14/horizon/admin/flavors/
  Django Version:     1.5.4
  Exception Type:     TypeError
  Exception Value:    
  
  list() got an unexpected keyword argument 'is_public'
  
  Exception Location:     /usr/share/openstack-dashboard/openstack_dashboard/wsgi/../../openstack_dashboard/api/nova.py in flavor_list, line 406
  Python Executable:  /usr/bin/python
  Python Version:     2.7.5
  Python Path:    
  
  ['/usr/share/openstack-dashboard/openstack_dashboard/wsgi/../..',
   '/usr/lib/python2.7',
   '/usr/lib/python2.7/plat-x86_64-linux-gnu',
   '/usr/lib/python2.7/lib-tk',
   '/usr/lib/python2.7/lib-old',
   '/usr/lib/python2.7/lib-dynload',
   '/usr/local/lib/python2.7/dist-packages',
   '/usr/lib/python2.7/dist-packages',
   '/usr/share/openstack-dashboard/',
   '/usr/share/openstack-dashboard/openstack_dashboard']  
  </code></pre>
  
  <p>After tracing the error I've found that method <code>list()</code> in <code>class FlavorManager</code> has no argument <code>is_public</code>.</p>
  
  <p><strong>Is this to be considered as a Bug or is there some misconfiguration?</strong></p>