Set failureThreshold to 3 for improved stability

[RokibulHasan7]

addon-agent restarts due to a connection error: "cannot connect once" err="rpc error: code = Unavailable desc = connection error: desc = \"transport: Error while dialing: dial tcp 127.0.0.1:8091: connect: connection refused\""

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 15.36%. Comparing base (870ab80) to head (9e43887).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #214   +/-   ##
=======================================
  Coverage   15.36%   15.36%           
=======================================
  Files          32       32           
  Lines        2011     2011           
=======================================
  Hits          309      309           
  Misses       1680     1680           
  Partials       22       22           

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[qiujian16]

/approve
/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

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[xuezhaojun]

@RokibulHasan7 The error log reflects the connect error to the proxy-server, change failureThreshould doesn't help in this case.

[xuezhaojun]

@qiujian16 @RokibulHasan7 Suggest revert by: #216

[xuezhaojun]

After discussion, we found it's not a bug, the root cause is the default entrypoint type is PortForward which is not suite to k3s in a VM case.