Bug: VoQ testcase should account for short delay for portchannel ARP to populate

[Javier-Tan]

Is it platform specific

generic

Importance or Severity

Low

Description of the bug

Testcase voq/test_voq_nbr.py::TestNeighborLinkFlap::test_front_panel_linkflap_port fails on condition table state delay is not reachable. This is because the test expects the ARP table to update instantly from STALE to REACHABLE after a ping is sent, which is the case for non-portchannel interfaces, however there is a small 2-3s delay state for portchannel interfaces STALE -> DELAY (2-3s) -> REACHABLE

Steps to Reproduce

Follow the test steps for voq/test_voq_nbr.py::TestNeighborLinkFlap::test_front_panel_linkflap_port until before the SONiC ping (line 1134), then see how long it takes for the ping to update the ARP table.

Actual Behavior and Expected Behavior

The test should leave some room for ARP table to be populated, similar to how it is done in test_front_panel_admindown_port of the same test.

Relevant log output

N/A

Output of show version

N/A

Attach files (if any)

No response