Remove testing of bdm v1 in boot from volume tests

The BDM v1 payload in Nova is really really old, and we don't even
document it anywhere anymore (it's actually unclear if this was ever
documented).

Just use the BDM v2 payload, don't run all these tests twice.

Change-Id: I1be3c16e499ac0131b24b889f17361d4a1835f02

tempest/scenario/test_volume_boot_pattern.py

@@ -43,16 +43,13 @@ def _create_volume_from_image(self):
         return self.create_volume(name=vol_name, imageRef=img_uuid)
 
     def _get_bdm(self, source_id, source_type, delete_on_termination=False):
-        # NOTE(gfidente): the syntax for block_device_mapping is
-        # dev_name=id:type:size:delete_on_terminate
-        # where type needs to be "snap" if the server is booted
-        # from a snapshot, size instead can be safely left empty
-
-        bd_map = [{
-            'device_name': 'vda',
-            '{}_id'.format(source_type): source_id,
-            'delete_on_termination': str(int(delete_on_termination))}]
-        return {'block_device_mapping': bd_map}
+        bd_map_v2 = [{
+            'uuid': source_id,
+            'source_type': source_type,
+            'destination_type': 'volume',
+            'boot_index': 0,
+            'delete_on_termination': delete_on_termination}]
+        return {'block_device_mapping_v2': bd_map_v2}
 
     def _boot_instance_from_resource(self, source_id,
                                      source_type,
@@ -236,14 +233,3 @@ def test_create_ebs_image_and_check_boot(self):
 
         # delete instance
         self._delete_server(instance)
-
-
-class TestVolumeBootPatternV2(TestVolumeBootPattern):
-    def _get_bdm(self, source_id, source_type, delete_on_termination=False):
-        bd_map_v2 = [{
-            'uuid': source_id,
-            'source_type': source_type,
-            'destination_type': 'volume',
-            'boot_index': 0,
-            'delete_on_termination': delete_on_termination}]
-        return {'block_device_mapping_v2': bd_map_v2}