Source:
	✔ [default] Get the latest kubectl version(githubrelease)


Condition:
	✔ [dockerfileArgKubectlVersion] Does the Dockerfile have an ARG instruction which key is KUBECTL_VERSION?(dockerfile)
	✔ [testCstKubectlVersion] Update the value of KUBECTL_VERSION in the test harness(yaml)

Target:
	✔ [updateCst] Update the value of KUBECTL_VERSION in the test harness(yaml)
	✔ [updateDockerfile] Update the value of ARG KUBECTL_VERSION in the Dockerfile(dockerfile)