USHIFT-3155: extend greenboot timeout for CI

[pacevedom]

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[openshift-ci-robot]

@pacevedom: This pull request references USHIFT-3155 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the bug to target the "4.16.0" version, but no target version was set.

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[ggiguash]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ggiguash, pacevedom

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