OWNERS: add more core team members as approvers

[staebler]

Add jhixson74, jstuever, and patrickdillon as installer-approvers.

[staebler]

/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: staebler

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Needs approval from an approver in each of these files:

• OWNERS [staebler]

Approvers can indicate their approval by writing /approve in a comment
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[openshift-ci]

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

Test name	Commit	Details	Rerun command
ci/prow/e2e-libvirt	eddbb6d	link	/test e2e-libvirt
ci/prow/e2e-aws-workers-rhel7	eddbb6d	link	/test e2e-aws-workers-rhel7
ci/prow/e2e-metal-ipi-ovn-ipv6	eddbb6d	link	/test e2e-metal-ipi-ovn-ipv6
ci/prow/e2e-crc	eddbb6d	link	/test e2e-crc
ci/prow/e2e-aws	eddbb6d	link	/test e2e-aws
ci/prow/e2e-aws-upgrade	eddbb6d	link	/test e2e-aws-upgrade

Full PR test history. Your PR dashboard.

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.

[jstuever]

/cherry-pick release-4.7

[openshift-cherrypick-robot]

@jstuever: new pull request created: #5123

In response to this:

/cherry-pick release-4.7

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.

[jstuever]

/cherry-pick release-4.8

[jstuever]

/cherry-pick release-4.6

[openshift-cherrypick-robot]

@jstuever: new pull request created: #5124

In response to this:

/cherry-pick release-4.8

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.

[openshift-cherrypick-robot]

@jstuever: new pull request created: #5125

In response to this:

/cherry-pick release-4.6

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.