If the user choose remark-cos value of the hwRateLimitConformActionType,
This object can be used to set the conform COS value. There are a few
enumerations as follows:
background Specify background priority(1)
best-effort Specify best-effort priority(0)
controlled-load Specify controlled-load priority(4)
excellent-effort Specify excellent-effort priority(3)
network-management Specify network-management priority(7)
spare Specify spare priority(2)
video Specify video priority(5)
voice Specify voice priority(6)