add test_post_ok, and some notes for future testing
add test_post_ok, and some notes for future testing

devananda/python-redfish,uggla/python-redfish,vmisson/python-redfish,uggla/python-redfish,bcornec/python-redfish,devananda/python-redfish,bcornec/python-redfish,bcornec/python-redfish,vmisson/python-redfish,uggla/python-redfish