Add compute microversion 2.70

Compute 2.70 [1] added the tag parameter to the server interface and
volume attachment response bodies.

[1] https://docs.openstack.org/nova/latest/reference/api-microversion-history.html#id64

Change-Id: Ibde8e269db82d610d142b7785f1b1d8b91f495b0

openstack/compute/v2/server_interface.py

@@ -37,3 +37,7 @@ class ServerInterface(resource.Resource):
     port_state = resource.Body('port_state')
     #: The ID for the server.
     server_id = resource.URI('server_id')
+    #: Tags for the virtual interfaces.
+    tag = resource.Body('tag')
+    # tag introduced in 2.70
+    _max_microversion = '2.70'

openstack/compute/v2/volume_attachment.py

@@ -37,3 +37,7 @@ class VolumeAttachment(resource.Resource):
     volume_id = resource.Body('volumeId')
     #: The ID of the attachment you want to delete or update.
     attachment_id = resource.Body('attachment_id', alternate_id=True)
+    #: Virtual device tags for the attachment.
+    tag = resource.Body('tag')
+    # tag introduced in 2.70
+    _max_microversion = '2.70'

openstack/tests/unit/compute/v2/test_server_interface.py

@@ -27,6 +27,7 @@ EXAMPLE = {
     'port_id': '4',
     'port_state': '5',
     'server_id': '6',
+    'tag': '7',
 }
 
 
@@ -51,3 +52,4 @@ class TestServerInterface(base.TestCase):
         self.assertEqual(EXAMPLE['port_id'], sot.port_id)
         self.assertEqual(EXAMPLE['port_state'], sot.port_state)
         self.assertEqual(EXAMPLE['server_id'], sot.server_id)
+        self.assertEqual(EXAMPLE['tag'], sot.tag)

openstack/tests/unit/compute/v2/test_volume_attachment.py

@@ -18,6 +18,7 @@ EXAMPLE = {
     'device': '1',
     'id': '2',
     'volume_id': '3',
+    'tag': '4',
 }
 
 
@@ -44,3 +45,4 @@ class TestServerInterface(base.TestCase):
         self.assertEqual(EXAMPLE['device'], sot.device)
         self.assertEqual(EXAMPLE['id'], sot.id)
         self.assertEqual(EXAMPLE['volume_id'], sot.volume_id)
+        self.assertEqual(EXAMPLE['tag'], sot.tag)