Adapt bgpvpn scenario tests for tempest's scenario manager

Related-Issue: PRODX-35662
Change-Id: If7b60352299807f76bde1d39443a23c587d123d6
(cherry picked from commit c127602a68b2f0a6eb893a560ab06c981e1e1c46)
diff --git a/neutron_tempest_plugin/bgpvpn/scenario/manager.py b/neutron_tempest_plugin/bgpvpn/scenario/manager.py
index 297d6b6..f5e9bf2 100644
--- a/neutron_tempest_plugin/bgpvpn/scenario/manager.py
+++ b/neutron_tempest_plugin/bgpvpn/scenario/manager.py
@@ -223,9 +223,9 @@
         if not subnet_cidrs:
             subnet_cidrs = [[NET_A_S1], [NET_B_S1], [NET_C_S1]]
         for (name, subnet_cidrs) in zip(names, subnet_cidrs):
-            network = super(manager.NetworkScenarioTest,
-                            self).create_network(namestart=name,
-                    port_security_enabled=port_security)
+            network = super(NetworkScenarioTest, self).create_network(
+                namestart=name,
+                port_security_enabled=port_security)
             self.networks[name] = network
             self.subnets[name] = []
             for (j, cidr) in enumerate(subnet_cidrs):
@@ -293,10 +293,10 @@
                             'namestart': 'port-smoke',
                             'security_groups': security_groups}
 
-        port = super(manager.NetworkScenarioTest,
-                    self).create_port(network_id=network['id'],
-                                    client=clients.ports_client,
-                                    **create_port_body)
+        port = super(NetworkScenarioTest, self).create_port(
+            network_id=network['id'],
+            client=clients.ports_client,
+            **create_port_body)
 
         create_server_kwargs = {
             'key_name': keypair['name'],
@@ -508,8 +508,6 @@
         kwargs = dict()
         block_migration = getattr(self, 'block_migration', None)
         if self.block_migration is None:
-            if self.is_requested_microversion_compatible('2.24'):
-                kwargs['disk_over_commit'] = False
             block_migration = (CONF.compute_feature_enabled.
                                block_migration_for_live_migration and
                                not volume_backed)