[JENKINS-51716] Prevent non numeric run id from throwing exception when a run is actually found

[halkeye]

Description

See JENKINS-51716.

Super hard to test manually, since you need to have runs that have non numeric id. I believe jenkins has deprecated id, so most jobs will be null or a number.

If you can get that, then testing is just hitting any rest interface that returns the run. The front page will try and return the latest run for a job.

Submitter checklist

• Link to JIRA ticket in description, if appropriate.
• Change is code complete and matches issue description
• Appropriate unit or acceptance tests or explanation to why this change has no tests
• Reviewer's manual test instructions provided in PR description. See Reviewer's first task below.

Reviewer checklist

• Run the changes and verified the change matches the issue description
• Reviewed the code
• Verified that the appropriate tests have been written or valid explanation given

[sophistifunk]

[NicuPascu]

LGTM