Occasional failure with test_route_flap

[StormLiangMS]

Description

There are teardown errors when run test_route_flap, this issue should be a false alarm. Since the route which is not offloaded could be a transition state when enabled fib suppress?

In below PR, it start to check rt_frr_miss, but it may not an issue, since it is possible status during offloading.
Need to change the error print of monit, at least exclude rt_frr_miss

if results:
    print_message(syslog.LOG_WARNING, "Failure results: {",  json.dumps(results, indent=4), "}")
    print_message(syslog.LOG_WARNING, "Failed. Look at reported mismatches above")
    print_message(syslog.LOG_WARNING, "add: ", json.dumps(adds, indent=4))
    print_message(syslog.LOG_WARNING, "del: ", json.dumps(deletes, indent=4))

https://github.com/sonic-net/sonic-utilities/pull/2762/files#diff-f439f7943825c8e2474af7986da58a2b53fbbbb23cde03cef170b760a6a3f2df

Match Messages:
E Aug 24 19:08:08.485455 str2-7050cx3-acs-02 ERR monit[608]: 'routeCheck' status failed (255) -- Failure results: {{#12 "missed_FRR_routes": [#12 {#12 "destSelected": true,#12 "distance": 20,#12 "failed": true,#12 "installedNexthopGroupId": 128,#12 "internalFlags": 8,#12 "internalNextHopActiveNum": 4,#12 "internalNextHopNum": 4,#12 "internalStatus": 168,#12 "metric": 0,#12 "nexthopGroupId": 128,#12 "nexthops": [#12 {#12 "active": true,#12 "afi": "ipv4",#12 "fib": true,#12 "flags": 3,#12 "interfaceIndex": 5,#12 "interfaceName": "PortChannel101",#12 "ip": "10.0.0.57",#12 "weight": 1#012 },
E
E Aug 24 19:14:08.863385 str2-7050cx3-acs-02 ERR monit[608]: 'routeCheck' status failed (255) -- Failure results: {{#12 "missed_FRR_routes": [#12 {#12 "destSelected": true,#12 "distance": 20,#12 "failed": true,#12 "installedNexthopGroupId": 128,#12 "internalFlags": 8,#12 "internalNextHopActiveNum": 4,#12 "internalNextHopNum": 4,#12 "internalStatus": 168,#12 "metric": 0,#12 "nexthopGroupId": 128,#12 "nexthops": [#12 {#12 "active": true,#12 "afi": "ipv4",#12 "fib": true,#12 "flags": 3,#12 "interfaceIndex": 5,#12 "interfaceName": "PortChannel101",#12 "ip": "10.0.0.57",#12 "weight": 1#012 },
E
E Aug 24 19:20:09.361216 str2-7050cx3-acs-02 ERR monit[608]: 'routeCheck' status failed (255) -- Failure results: {{#12 "missed_FRR_routes": [#12 {#12 "destSelected": true,#12 "distance": 20,#12 "failed": true,#12 "installedNexthopGroupId": 128,#12 "internalFlags": 8,#12 "internalNextHopActiveNum": 4,#12 "internalNextHopNum": 4,#12 "internalStatus": 168,#12 "metric": 0,#12 "nexthopGroupId": 128,#12 "nexthops": [#12 {#12 "active": true,#12 "afi": "ipv4",#12 "fib": true,#12 "flags": 3,#12 "interfaceIndex": 5,#12 "interfaceName": "PortChannel101",#12 "ip": "10.0.0.57",#12 "weight": 1#012 },
E
E Aug 24 19:26:09.800484 str2-7050cx3-acs-02 ERR monit[608]: 'routeCheck' status failed (255) -- Failure results: {{#12 "missed_FRR_routes": [#12 {#12 "destSelected": true,#12 "distance": 20,#12 "failed": true,#12 "installedNexthopGroupId": 128,#12 "internalFlags": 8,#12 "internalNextHopActiveNum": 4,#12 "internalNextHopNum": 4,#12 "internalStatus": 168,#12 "metric": 0,#12 "nexthopGroupId": 128,#12 "nexthops": [#12 {#12 "active": true,#12 "afi": "ipv4",#12 "fib": true,#12 "flags": 3,#12 "interfaceIndex": 5,#12 "interfaceName": "PortChannel101",#12 "ip": "10.0.0.57",#12 "weight": 1#012 },
E
E Aug 24 19:32:10.217737 str2-7050cx3-acs-02 ERR monit[608]: 'routeCheck' status failed (255) -- Failure results: {{#12 "missed_FRR_routes": [#12 {#12 "destSelected": true,#12 "distance": 20,#12 "failed": true,#12 "installedNexthopGroupId": 128,#12 "internalFlags": 8,#12 "internalNextHopActiveNum": 4,#12 "internalNextHopNum": 4,#12 "internalStatus": 168,#12 "metric": 0,#12 "nexthopGroupId": 128,#12 "nexthops": [#12 {#12 "active": true,#12 "afi": "ipv4",#12 "fib": true,#12 "flags": 3,#12 "interfaceIndex": 5,#12 "interfaceName": "PortChannel101",#12 "ip": "10.0.0.57",#12 "weight": 1#012 },
E

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[prgeor]

@stepanblyschak please help to see if introudced by your pr changes