Fixed swss feature name for test_lldp_neighbor_post_orchagent_reboot

Signed-off-by: Anand Mehra anamehra@cisco.com

Description of PR

Summary: Fixes # https://github.com/sonic-net/sonic-mgmt/issues/14689

Type of change

[x] Bug fix
[ ] Testbed and Framework(new/improvement)
[ ] Test case(new/improvement)

Back port request

[ ] 201911
[ ] 202012
[ ] 202205
[ ] 202305
[ ] 202311

Approach

What is the motivation for this PR?

The test test_lldp_neighbor_post_orchagent_reboot fails on multi-asic system. The test tries to disable autorestart feature for swss by using the namespace container name, e.g., swss0, swss1, etc

For config feature autorestart disable, it needs to use 'swss' as global feature name

How did you do it?

Changed code to use 'swss' as feature name without using namespace id

How did you verify/test it?

run sonic-mgmt test_lldp.py

------------------------------------------------------------------------------------------------------------------- live log sessionfinish --------------------------------------------------------------------------------------------------------------------
15:30:20 __init__.pytest_terminal_summary         L0067 INFO   | Can not get Allure report URL. Please check logs
=================================================================================================================== short test summary info ===================================================================================================================
PASSED lldp/test_lldp.py::test_lldp_neighbor_post_orchagent_reboot[sfd-t2-lc0-0]
PASSED lldp/test_lldp.py::test_lldp_neighbor_post_orchagent_reboot[sfd-t2-lc0-1]
PASSED lldp/test_lldp.py::test_lldp_neighbor_post_orchagent_reboot[sfd-t2-lc0-2]
========================================================================================================== 3 passed, 1 warning in 472.45s (0:07:52) ===========================================================================================================```

sonic-net / sonic-mgmt

Fixed swss feature name for test_lldp_neighbor_post_orchagent_reboot #15715