If the user chooses remark-cos value of the h3cQoSTrafLmtConformActionType,
this object can be used to set the conform cos value.
There are some enumerations as follows:
best-effort Specify best-effort priority(0)
background Specify background priority(1)
spare Specify spare priority(2)
excellent-effort Specify excellent-effort priority(3)
controlled-load Specify controlled-load priority(4)
video Specify video priority(5)
voice Specify voice priority(6)
network-management Specify network-management priority(7)
255 indicates invalid value.