Add suite cleanup in pldm/test_pldm_platform.robot
Add suite cleanup in pldm/test_pldm_platform.robot

Change-Id: I1833503961e4c4acce9e741077796f9ba458d96d
Signed-off-by: Sridevi Ramesh <cb5e1f81dd390dfc3a9afc08ab7298b7ab4296f5@in.ibm.com>

openbmc/openbmc-test-automation,openbmc/openbmc-test-automation