docs: def image_list(self, name=None):
          '''
          List server images
          '''
          nt_ks = self.compute_conn
          ret = {}
          for image in nt_ks.images.list():
              links = {}
              for link in image.links:
                  links[link['rel']] = link['href']
              ret[image.name] = {
                  'name': image.name,
                  'id': image.id,
                  'status': image.status,
                  'progress': image.progress,
                  'created': image.created,
                  'updated': image.updated,
                  'metadata': image.metadata,
                  'links': links,
              }
              if hasattr(image, 'minDisk'):
                  ret[image.name]['minDisk'] = image.minDisk
              if hasattr(image, 'minRam'):
                  ret[image.name]['minRam'] = image.minRam
          if name:
              return {name: ret[name]}
          return ret