COPP_DEL_fix: op="DEL" for one trap group from SONIC is resetting all the …

[SinghMinu]

…trap IDs

What I did
Called hostif trap remove only for those trap IDs which belong to the trap group for which op="DEL" is set.

Why I did it
hostif trap remove was being called for all the trap IDs belonging to all trap groups. It was resetting all trap IDs to the default trap group configurations.

How I verified it
Followed below steps:
1)Loaded the COPP configuration "00-copp.config.json".
2)Verified that the rate limit and queue mapping for every trap ID is correct .
3)Loaded the below mentioned configuration (with op = "DEL") for the trap group(arp) using
swssconfig command.

[(no_arp.json)]
[
{
"COPP_TABLE:trap.group.arp": {
"trap_ids": "arp_req,arp_resp,neigh_discovery",
"trap_action":"copy",
"trap_priority":"4",
"queue": "4",
"meter_type":"packets",
"mode":"sr_tcm",
"cir":"600",
"cbs":"600",
"red_action":"drop"
},
"OP": "DEL"
}
]
4) Only the trap IDs belonging to the arp trap group are getting reset to the default trap group configuration. Rest of the trap IDs belonging to other trap groups still have their corresponding configuration.
5) All these verification are done through the ASIC CLI and sending corresponding packets.

Details if related

[SinghMinu]

@lguohan : Kindly add reviewers for this PR.

[prsunny]

lgtm

[prsunny]

@dgsudharsan , can you please review as well based on the new changes?