Upgrade kubectl binary to v1.18.14

[vgunapati]

No description provided.

[CLAassistant]

All committers have signed the CLA.

[eytan-avisror]

I think you need to sign off DCO @vgunapati
Also, should we also update client-go to same version? or is there a specific reason we need to update kubectl exclusively? if there is a bug with 1.16.x kubectl we can merge this now and update client-go later

[vgunapati]

@eytan-avisror we don't have any bug with 1.16, based on this doc kubectl is supported within one minor version (older or newer) of kube-apiserver

we should update client-go as well but will need more testing, as the current client-go is based on git hash

k8s.io/client-go v0.0.0-20190620085101-78d2af792bab

[codecov]

Codecov Report

Merging #68 (debb431) into master (06857be) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #68   +/-   ##
=======================================
  Coverage   69.82%   69.82%           
=======================================
  Files          12       12           
  Lines         898      898           
=======================================
  Hits          627      627           
  Misses        211      211           
  Partials       60       60           

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