Use classname as prefix of volume name

Sometimes volume may not be cleaned properly and from its name
(such as tempest-Volume-245831117) it is difficult to know which
testcase created it. This is to use classname as prefix of volume
name.

Change-Id: Ic0e376098caa0c46473d92f6d043ab85fbbaee8c
diff --git a/tempest/api/volume/test_volumes_snapshots.py b/tempest/api/volume/test_volumes_snapshots.py
old mode 100644
new mode 100755
index c7f1e6e..20c647a
--- a/tempest/api/volume/test_volumes_snapshots.py
+++ b/tempest/api/volume/test_volumes_snapshots.py
@@ -75,7 +75,8 @@
     def test_snapshot_create_with_volume_in_use(self):
         # Create a snapshot when volume status is in-use
         # Create a test instance
-        server_name = data_utils.rand_name('instance')
+        server_name = data_utils.rand_name(
+            self.__class__.__name__ + '-instance')
         server = self.create_server(
             name=server_name,
             wait_until='ACTIVE')
@@ -98,7 +99,7 @@
     @test.idempotent_id('2a8abbe4-d871-46db-b049-c41f5af8216e')
     def test_snapshot_create_get_list_update_delete(self):
         # Create a snapshot
-        s_name = data_utils.rand_name('snap')
+        s_name = data_utils.rand_name(self.__class__.__name__ + '-snap')
         params = {self.name_field: s_name}
         snapshot = self.create_snapshot(self.volume_origin['id'], **params)
 
@@ -116,7 +117,8 @@
         self.assertIn(tracking_data, snaps_data)
 
         # Updates snapshot with new values
-        new_s_name = data_utils.rand_name('new-snap')
+        new_s_name = data_utils.rand_name(
+            self.__class__.__name__ + '-new-snap')
         new_desc = 'This is the new description of snapshot.'
         params = {self.name_field: new_s_name,
                   self.descrip_field: new_desc}
@@ -138,7 +140,7 @@
     def test_snapshots_list_with_params(self):
         """list snapshots with params."""
         # Create a snapshot
-        display_name = data_utils.rand_name('snap')
+        display_name = data_utils.rand_name(self.__class__.__name__ + '-snap')
         params = {self.name_field: display_name}
         snapshot = self.create_snapshot(self.volume_origin['id'], **params)
         self.addCleanup(self.cleanup_snapshot, snapshot)
@@ -160,7 +162,7 @@
     def test_snapshots_list_details_with_params(self):
         """list snapshot details with params."""
         # Create a snapshot
-        display_name = data_utils.rand_name('snap')
+        display_name = data_utils.rand_name(self.__class__.__name__ + '-snap')
         params = {self.name_field: display_name}
         snapshot = self.create_snapshot(self.volume_origin['id'], **params)
         self.addCleanup(self.cleanup_snapshot, snapshot)