Remove unused variables

test_server_rescue.py: client assigned, but never read in
			test_rescued_vm_attach_volume.
test_attach_volume.py: "attached" member used without the "self."

Change-Id: I2c3942ee9fde7cd92144ac879aaff99f136cab7f
diff --git a/tempest/tests/compute/servers/test_server_rescue.py b/tempest/tests/compute/servers/test_server_rescue.py
index 61ba384..29c9944 100644
--- a/tempest/tests/compute/servers/test_server_rescue.py
+++ b/tempest/tests/compute/servers/test_server_rescue.py
@@ -136,8 +136,6 @@
 
     @attr(type='negative')
     def test_rescued_vm_attach_volume(self):
-        client = self.volumes_extensions_client
-
         # Rescue the server
         self.servers_client.rescue_server(self.server_id, self.password)
         self.servers_client.wait_for_server_status(self.server_id, 'RESCUE')
diff --git a/tempest/tests/compute/volumes/test_attach_volume.py b/tempest/tests/compute/volumes/test_attach_volume.py
index 57f1e20..1b52ccf 100644
--- a/tempest/tests/compute/volumes/test_attach_volume.py
+++ b/tempest/tests/compute/volumes/test_attach_volume.py
@@ -91,7 +91,7 @@
             self.assertTrue(self.device in partitions)
 
             self._detach(server['id'], volume['id'])
-            attached = False
+            self.attached = False
 
             self.servers_client.stop(server['id'])
             self.servers_client.wait_for_server_status(server['id'], 'SHUTOFF')