Format correctly (dialect=mac_unix_expanded) the MAC addresses

Format correctly (dialect=mac_unix_expanded) the MAC addresses in
``DHCPAgentOVSTestFramework``. Before this patch, this is the leases
file the DHCP server was using:
  Done building initial lease file
    /tmp/tmp3_m7_fqk/tmpiadm5q0e/9afb0444-e28e-4582-abb0-031d6ed500e4/leases
    with contents:
  1676775199 24:77:3:7d:0:4c 192.168.10.11 * *
  1676775199 24:77:3:7d:0:3a 192.168.10.1 * *

Related-Bug: #2007992
Change-Id: Ie903fd3f645f7428854cf6b2fe48a1edf342cc32
(cherry picked from commit c61ce34)

Author: ralonsoh

neutron/tests/functional/agent/test_dhcp_agent.py

@@ -20,6 +20,7 @@
 import eventlet
 import fixtures
 import netaddr
+from neutron_lib.api import converters
 from neutron_lib import constants as lib_const
 from oslo_config import fixture as fixture_config
 from oslo_utils import uuidutils
@@ -42,10 +43,10 @@
 
 class DHCPAgentOVSTestFramework(base.BaseSudoTestCase):
 
-    _DHCP_PORT_MAC_ADDRESS = netaddr.EUI("24:77:03:7d:00:4c")
-    _DHCP_PORT_MAC_ADDRESS.dialect = netaddr.mac_unix
-    _TENANT_PORT_MAC_ADDRESS = netaddr.EUI("24:77:03:7d:00:3a")
-    _TENANT_PORT_MAC_ADDRESS.dialect = netaddr.mac_unix
+    _DHCP_PORT_MAC_ADDRESS = converters.convert_to_sanitized_mac_address(
+        '24:77:03:7d:00:4c')
+    _TENANT_PORT_MAC_ADDRESS = converters.convert_to_sanitized_mac_address(
+        '24:77:03:7d:00:3a')
 
     _IP_ADDRS = {
         4: {'addr': '192.168.10.11',
@@ -307,9 +308,8 @@ def test_bad_address_allocation(self):
         network, port = self._get_network_port_for_allocation_test()
         network.ports.append(port)
         self.configure_dhcp_for_network(network=network)
-        bad_mac_address = netaddr.EUI(self._TENANT_PORT_MAC_ADDRESS.value + 1)
-        bad_mac_address.dialect = netaddr.mac_unix
-        port.mac_address = str(bad_mac_address)
+        port.mac_address = converters.convert_to_sanitized_mac_address(
+            '24:77:03:7d:00:4d')
         self._plug_port_for_dhcp_request(network, port)
         self.assert_bad_allocation_for_port(network, port)