Fix checking exit code of happy path test

[sleshchenko]

What does this PR do?

Fix checking exit code of happy path test.

What issues does this PR fix or reference?

Is it tested? How?

PR Checklist

• E2E tests pass (when PR is ready, comment /test v8-devworkspace-operator-e2e, v8-che-happy-path to trigger)
  • v8-devworkspace-operator-e2e: DevWorkspace e2e test
  • v8-che-happy-path: Happy path for verification integration with Che

[sleshchenko]

/test v8-devworkspace-operator-e2e, v8-che-happy-path

[openshift-ci]

@sleshchenko: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/v8-che-happy-path	66d2644	link	true	/test v8-che-happy-path

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[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JPinkney, sleshchenko

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• OWNERS [JPinkney,sleshchenko]

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[sleshchenko]

Che Happy path test failed as expected