Gets list of swss docker names.
There should be a docker name for each NPU present on the DUT.
def test_fun(duthosts, rand_one_dut_hostname):
duthost = duthosts[rand_one_dut_hostname]
swss_names = duthost.get_swss_docker_names()
Takes no arguments.
Returns list of swss docker names. If there is only one NPU, the output should look like ["swss"]
.