Remove name checking for api version 1

Since cinder api version 1 is deprecated, it's redundant
to check 'display_name' field.

Change-Id: I17f610994f496da246dae0c5b77c20ab32f19218
diff --git a/tempest/scenario/manager.py b/tempest/scenario/manager.py
index 727afd6..6aa2a83 100644
--- a/tempest/scenario/manager.py
+++ b/tempest/scenario/manager.py
@@ -235,12 +235,7 @@
                         volume['id'])
         self.addCleanup(test_utils.call_and_ignore_notfound_exc,
                         self.volumes_client.delete_volume, volume['id'])
-
-        # NOTE(e0ne): Cinder API v2 uses name instead of display_name
-        if 'display_name' in volume:
-            self.assertEqual(name, volume['display_name'])
-        else:
-            self.assertEqual(name, volume['name'])
+        self.assertEqual(name, volume['name'])
         waiters.wait_for_volume_resource_status(self.volumes_client,
                                                 volume['id'], 'available')
         # The volume retrieved on creation has a non-up-to-date status.
diff --git a/tempest/scenario/test_stamp_pattern.py b/tempest/scenario/test_stamp_pattern.py
index 96b423d..5f5d701 100644
--- a/tempest/scenario/test_stamp_pattern.py
+++ b/tempest/scenario/test_stamp_pattern.py
@@ -68,10 +68,7 @@
                                                 volume['id'], 'available')
         waiters.wait_for_volume_resource_status(self.snapshots_client,
                                                 snapshot['id'], 'available')
-        if 'display_name' in snapshot:
-            self.assertEqual(snapshot_name, snapshot['display_name'])
-        else:
-            self.assertEqual(snapshot_name, snapshot['name'])
+        self.assertEqual(snapshot_name, snapshot['name'])
         return snapshot
 
     def _wait_for_volume_available_on_the_system(self, ip_address,
diff --git a/tempest/scenario/test_volume_boot_pattern.py b/tempest/scenario/test_volume_boot_pattern.py
index ae0230e..888bff2 100644
--- a/tempest/scenario/test_volume_boot_pattern.py
+++ b/tempest/scenario/test_volume_boot_pattern.py
@@ -81,13 +81,7 @@
         self.addCleanup(self.snapshots_client.delete_snapshot, snap['id'])
         waiters.wait_for_volume_resource_status(self.snapshots_client,
                                                 snap['id'], 'available')
-
-        # NOTE(e0ne): Cinder API v2 uses name instead of display_name
-        if 'display_name' in snap:
-            self.assertEqual(snap_name, snap['display_name'])
-        else:
-            self.assertEqual(snap_name, snap['name'])
-
+        self.assertEqual(snap_name, snap['name'])
         return snap
 
     def _delete_server(self, server):