Fix missing volume_name_template flag.

volume_template_name was converted to a self.configuration option,
however we don't import that opt in the self.configuration changes.

This patch switches the specifier back to the global CONF

Fixes bug: 1199909

Change-Id: I1431ba8a46b3a86ed77c02646a1c5fd1f62ae010

cinder/volume/drivers/lvm.py

@@ -300,7 +300,7 @@ def copy_volume_to_image(self, context, volume, image_service, image_meta):
     def create_cloned_volume(self, volume, src_vref):
         """Creates a clone of the specified volume."""
         LOG.info(_('Creating clone of volume: %s') % src_vref['id'])
-        volume_name = self.configuration.volume_name_template % src_vref['id']
+        volume_name = CONF.volume_name_template % src_vref['id']
         temp_id = 'tmp-snap-%s' % src_vref['id']
         temp_snapshot = {'volume_name': volume_name,
                          'size': src_vref['size'],