Fix log formatting for skipper.

[msau42]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:

/kind api-change
/kind bug
/kind cleanup
/kind deprecation
/kind design
/kind documentation
/kind failing-test
/kind feature
/kind flake

What this PR does / why we need it:
Skipped tests were logging messages like:

Mar  4 17:42:20.259: INFO: INFO
%!(EXTRA string=Driver supports dynamic provisioning, skipping InlineVolume pattern)[AfterEach] [Testpattern: Inline-volume (default fs)] subPath
  /workspace/go/src/k8s.io/kubernetes/_output/local/go/src/k8s.io/kubernetes/test/e2e/framework/framework.go:179

"INFO" is already logged by Logf, and it wasn't in the format syntax.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

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

[msau42]

/kind cleanup
/sig test

[k8s-ci-robot]

@msau42: The label(s) sig/test cannot be applied, because the repository doesn't have them

In response to this:

/kind cleanup
/sig test

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.

[msau42]

/sig testing

[msau42]

/assign @oomichi

[neolit123]

thanks!
/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: msau42, neolit123

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• test/e2e/framework/OWNERS [msau42,neolit123]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[fejta-bot]

/retest
This bot automatically retries jobs that failed/flaked on approved PRs (send feedback to fejta).

Review the full test history for this PR.

Silence the bot with an /lgtm cancel or /hold comment for consistent failures.

[k8s-ci-robot]

@msau42: The following test failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
pull-kubernetes-e2e-kind-ipv6	3ee3034	link	/test pull-kubernetes-e2e-kind-ipv6

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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. I understand the commands that are listed here.