fix "minikube update-context" command fail

[govargo]

What type of PR is this?

/kind bug

What this PR does / why we need it:

In minikube v1.4.0, minikube update-context command always fails.

This PR fixes this bug of the command fail.

Which issue(s) this PR fixes:

Fixes #5497

Does this PR introduce a user-facing change?

Yes. this PR fixes bug in order to minikube update-context command work successfully.

Before this PR, minikube update-context command always fails

1. minikube update-context(error)
update config: Kubeconfig does not have a record of the machine cluster

After this PR, minikube update-context command works

1. minikube update-context(success)
minikube IP was already correctly configured for xxx.xxx.xxx.xxx
(or)
minikube IP has been updated to point at xxx.xxx.xxx.xxx

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

NONE

[k8s-ci-robot]

Hi @govargo. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: govargo
To complete the pull request process, please assign sharifelgamal
You can assign the PR to them by writing /assign @sharifelgamal in a comment when ready.

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[minikube-bot]

Can one of the admins verify this patch?

[codecov-io]

Codecov Report

Merging #5626 into master will not change coverage.
The diff coverage is 0%.

@@           Coverage Diff           @@
##           master    #5626   +/-   ##
=======================================
  Coverage   36.89%   36.89%           
=======================================
  Files         102      102           
  Lines        7369     7369           
=======================================
  Hits         2719     2719           
  Misses       4297     4297           
  Partials      353      353

Impacted Files	Coverage Δ
cmd/minikube/cmd/update-context.go	0% <0%> (ø)	⬆️

[govargo]

/assign @sharifelgamal

[sharifelgamal]

@minikube-bot OK to test

[sharifelgamal]

Thanks for fixing this!

[tstromberg]

Thanks! I will follow up with a PR that adds update-context to our integration tests.

[govargo]

@tstromberg
Thank you for your Merge and integration tests PR.
I'll check that PR.
And I ’ll write integration tests from next PR if same situation.