fix(scannerdefs): some minor scannerdefinitions handler fixes

[RTann]

Description

Mostly nits including some IDE warnings. One bug fix to account for offline blob retrieval error, which was previously ignored. Still have another IDE warning to look into.

Checklist

• Investigated and inspected CI test results
• [ ] Unit test and regression tests added
• [ ] Evaluated and added CHANGELOG entry if required
• [ ] Determined and documented upgrade steps
• [ ] Documented user facing changes (create PR based on openshift/openshift-docs and merge into rhacs-docs)

Testing Performed

Here I tell how I validated my change

No

Reminder for reviewers

In addition to reviewing code here, reviewers must also review testing and request further testing in case the
performed one does not seem sufficient. As a reviewer, you must not approve the change until you understand the
performed testing and you are satisfied with it.

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[rhacs-bot]

Images are ready for the commit at 4768397.

To use with deploy scripts, first export MAIN_IMAGE_TAG=4.4.x-727-g47683977aa.