Add glance image colocation feature for Virtuozzo driver

This patch adds the exisiting glance image colocation feature for
virtuozzo driver (which was restored recently).

Change-Id: I5278d97c98f44ca2f4dddf185cf108f72735d7b0
Closes-Bug: #1873463
(cherry picked from commit 89b86b650f)

cinder/image/image_utils.py

@@ -682,6 +682,8 @@ def _validate_file_format(image_data, expected_format):
 def upload_volume(context, image_service, image_meta, volume_path,
                   volume_format='raw', run_as_root=True, compress=True,
                   store_id=None, base_image_ref=None):
+    # NOTE: You probably want to use volume_utils.upload_volume(),
+    # not this function.
     image_id = image_meta['id']
     if image_meta.get('container_format') != 'compressed':
         if (image_meta['disk_format'] == volume_format):

cinder/volume/drivers/vzstorage.py

@@ -33,6 +33,7 @@ from cinder import interface
 from cinder import utils
 from cinder.volume import configuration
 from cinder.volume.drivers import remotefs as remotefs_drv
+from cinder.volume import volume_utils
 
 LOG = logging.getLogger(__name__)
 
@@ -684,11 +685,11 @@ class VZStorageDriver(remotefs_drv.RemoteFSSnapDriver):
         if volume_format == DISK_FORMAT_PLOOP:
             with PloopDevice(self.local_path(volume),
                              execute=self._execute) as dev:
-                image_utils.upload_volume(context,
-                                          image_service,
-                                          image_meta,
-                                          dev,
-                                          volume_format='raw')
+                volume_utils.upload_volume(context,
+                                           image_service,
+                                           image_meta,
+                                           dev,
+                                           volume)
         else:
             super(VZStorageDriver, self)._copy_volume_to_image(context, volume,
                                                                image_service,