Change compute volume client to return one value and update tests
This included the volume extensions client and the volume-related methods
in the servers client.
Partially implements: blueprint clients-return-one-value
Change-Id: Ice07e38037665def7a8e2982be85ce4df3726311
diff --git a/tempest/scenario/test_stamp_pattern.py b/tempest/scenario/test_stamp_pattern.py
index cfc1d37..e59858b 100644
--- a/tempest/scenario/test_stamp_pattern.py
+++ b/tempest/scenario/test_stamp_pattern.py
@@ -101,7 +101,7 @@
def _attach_volume(self, server, volume):
# TODO(andreaf) we should use device from config instead if vdb
- _, attached_volume = self.servers_client.attach_volume(
+ attached_volume = self.servers_client.attach_volume(
server['id'], volume['id'], device='/dev/vdb')
self.assertEqual(volume['id'], attached_volume['id'])
self._wait_for_volume_status(attached_volume, 'in-use')