Support volume transfer name filters

The `name` filter for volume transfer is not currently recognized by the
API. Instead, it allowed filtering on 'display_name', which is not the
actual name of any attribute of the resource.
This patch adds the support for it while secretly continuing to
support `display_name` as a valid filter so as not to break people who
have figured out the workaround.

Change-Id: I6a4d12d5dd55080e9aa73027ed82d3bf13855e28
Closes-Bug: #1860100

cinder/api/contrib/volume_transfer.py

@@ -61,6 +61,8 @@ class VolumeTransferController(wsgi.Controller):
         context = req.environ['cinder.context']
         filters = req.params.copy()
         LOG.debug('Listing volume transfers')
+        if 'name' in filters:
+            filters['display_name'] = filters.pop('name')
         transfers = self.transfer_api.get_all(context, filters=filters,
                                               sort_keys=['created_at', 'id'],
                                               sort_dirs=['asc', 'asc'])

cinder/api/v3/volume_transfer.py

@@ -46,6 +46,8 @@ class VolumeTransferController(volume_transfer_v2.VolumeTransferController):
             # as default order, but we should keep the compatible in here.
             sort_keys, sort_dirs = ['created_at', 'id'], ['asc', 'asc']
         filters = params
+        if 'name' in filters:
+            filters['display_name'] = filters.pop('name')
         LOG.debug('Listing volume transfers')
 
         transfers = self.transfer_api.get_all(context, marker=marker,

releasenotes/notes/bug-1860100-8c542363def7d408.yaml

@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    The volume-transfers list calls (``GET /v3/{project_id}/volume-transfers``,
+    ``GET /v3/{project_id}/volume-transfers/detail``) were not recognizing ``name``
+    as a filterable attribute.  That has been fixed in the current release.