NO-JIRA:Bump CPO Read API budget to 4000 in EnsureApiBudget

[Patryk-Stefanski]

Bump CPO Read API budget to 4000 in EnsureApiBudget to stay in sync with 4.15

[openshift-ci-robot]

@Patryk-Stefanski: This pull request explicitly references no jira issue.

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[stevekuznetsov]

/lgtm

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[csrwng]

/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: csrwng, Patryk-Stefanski

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