[action] [PR:9542] Restore the MAC address of VLAN at the end of test_host_vlan

[mssonicbld]

Description of PR

Summary:
This PR is to fix a code bug in test_host_vlan.py.
The fixture setup_host_vlan_intf_mac changed the MAC address of Vlan1000 but didn't restore it.
That results in test failure in test_interfaces.py

 def verify_mac_address(host_facts, intfs, router_mac):
 for intf in intfs:
 if 'attachto' in intf:
 ifname = intf['attachto']
 else:
 ifname = intf['name']
 
 pytest_assert(host_facts[ifname]['macaddress'].lower() == router_mac.lower(), \
> "interface {} mac address {} does not match router mac {}".format(ifname, host_facts[ifname]['macaddress'], router_mac))
E Failed: interface Vlan1000 mac address 1c:34:da:bb:84:ff does not match router mac 1c:34:da:bb:84:00

This PR fixed the issue by restoring the MAC address in the teardown of fixture setup_host_vlan_intf_mac.

Type of change

• Bug fix
• Testbed and Framework(new/improvement)
• Test case(new/improvement)

Back port request

• 201911
• 202012
• 202205
• 202305

Approach

What is the motivation for this PR?

This PR is to fix a code bug in test_host_vlan.py.

How did you do it?

This PR fixed the issue by restoring the MAC address in the teardown of fixture setup_host_vlan_intf_mac.

How did you verify/test it?

The change is verified on a SN4600 testbed. The MAC address of Vlan1000 is restored after test running.

Any platform specific information?

No.

Supported testbed topology if it's a new test case?

Not a new test case.

Documentation

[mssonicbld]

Original PR: #9542