[yang-models] POLICER table missing

[wen587]

Description

POLICER yang is needed. It is used to set rate limit for mirror-session

Steps to reproduce the issue:

1. Sample configDB table about policer.

admin@vlab-01:~/everflow$ cat policer.json
{
  "POLICER": {
    "everflow_static_policer": {
    "meter_type": "bytes",
    "mode": "sr_tcm",
    "cir": "12500000",
    "cbs": "12500000",
    "red_packet_action": "drop"
    }
  }
}

2. apply-patch to add policer

admin@vlab-01:~/everflow$ sudo config apply-patch -i /FEATURE -i /QUEUE -i /SCHEDULER add_policer.json
Patch Applier: Patch application starting.
Patch Applier: Patch: [{"op": "add", "path": "/POLICER", "value": {"everflow_static_policer": {"meter_type": "bytes", "mode": "sr_tcm", "cir": "12500000", "cbs": "12500000", "red_packet_action": "drop"}}}]
Patch Applier: Getting current config db.
Patch Applier: Simulating the target full config after applying the patch.
Patch Applier: Validating target config does not have empty tables, since they do not show up in ConfigDb.
Patch Applier: Sorting patch updates.
Note: Below table(s) have no YANG models:
BGP_PEER_RANGE, CONSOLE_SWITCH, DEVICE_NEIGHBOR_METADATA, DHCP_SERVER, KDUMP, RESTAPI, SNMP, SNMP_COMMUNITY, TELEMETRY, POLICER,
Note: Below table(s) have no YANG models:
POLICER,
Failed to apply patch
Usage: config apply-patch [OPTIONS] PATCH_FILE_PATH
Try "config apply-patch -h" for help.

Error: Given YANG covered config patch is not valid because it has changes to tables without YANG models

Describe the results you received:

Action failed.

Describe the results you expected:

Yang model should provide verification.

Output of show version:

admin@vlab-01:~/everflow$ show ver

SONiC Software Version: SONiC.master.58770-6402a0226
Distribution: Debian 11.1
Kernel: 5.10.0-8-2-amd64
Build commit: 6402a0226
Build date: Mon Dec 13 09:02:14 UTC 2021
Built by: AzDevOps@sonic-build-workers-000Z9S

Platform: x86_64-kvm_x86_64-r0
HwSKU: Force10-S6000
ASIC: vs
ASIC Count: 1
Serial Number: N/A
Model Number: N/A
Hardware Revision: N/A
Uptime: 08:30:18 up  2:47,  2 users,  load average: 0.21, 0.35, 0.27

Output of show techsupport:

(paste your output here or download and attach the file here )

Additional information you deem important (e.g. issue happens only occasionally):