Use jq to format Grafana dashboards in json files

[oxddr]

Also add make target to simplify usage for other contributors.

/kind cleanup
/assign @mm4tt

[k8s-ci-robot]

Hi @oxddr. 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.

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[mborsz]

Nice, thanks
/ok-to-test
/lgtm
/approve

[mm4tt]

Nice, can we have it in the verify/ dir (and in the verify + print command how to fix form) and run it as a part of presubmit?

[oxddr]

Nice, can we have it in the verify/ dir (and in the verify + print command how to fix form) and run it as a part of presubmit?

Done. I am not sure whether travis config is 100% correct.

[mm4tt]

Nice, thanks!
/lgtm
/approve

[mm4tt]

Oh, looks like there are merge conflicts, please fix

[oxddr]

@mm4tt PTAL

[mm4tt]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mborsz, mm4tt, oxddr

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