fix: add err check before further operation

[beautytiger]

Description of the change:
After calling NewQueueInformer, it good to check the err first for further step. Other place in this project all follow this pattern, I think here shoud too.

Motivation for the change:

Reviewer Checklist

• Implementation matches the proposed design, or proposal is updated to match implementation
• Sufficient unit test coverage
• Sufficient end-to-end test coverage
• Docs updated or added to /docs
• Commit messages sensible and descriptive

[openshift-ci-robot]

Hi @beautytiger. Thanks for your PR.

I'm waiting for a operator-framework member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[exdx]

/ok-to-test

[jpeeler]

/lgtm

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: beautytiger, jpeeler

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[awgreene]

/retest

[exdx]

/retest

[beautytiger]

/test e2e-aws-olm

[jpeeler]

/retest

[njhale]

/retest

[jpeeler]

/retest

[njhale]

/retest

[ecordell]

/retest

[njhale]

/retest