Add reviewers to OWNERS

[pierreprinetti]

No description provided.

[openshift-ci-robot]

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

Test name	Commit	Details	Rerun command
ci/prow/e2e-openstack	7ac4268	link	/test e2e-openstack

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.

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[mandre]

/lgtm

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mandre, pierreprinetti

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:

• OWNERS [mandre,pierreprinetti]

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

[openshift-bot]

/retest

Please review the full test history for this PR and help us cut down flakes.