Introduce new Run#getBuildsOverThreshold() method for getting runs above the desired execution result

[jsoref]

Refactored as Run.getBuildsOverThreshold
This is for discussion.

Notes:

• Most commits were created by IntelliJ
• Individual commits are mostly self contained
• In general, most commits should not change program behavior at all

This is generally a subset of https://github.com/jsoref/jenkins/commits/java-cleanup-full

Proposed changelog entries

• Internal: Internal Java code cleanup

Submitter checklist

• JIRA issue is well described
• Changelog entry appropriate for the audience affected by the change (users or developer, depending on the change). Examples
  * Use the Internal: prefix if the change has no user-visible impact (API, test frameworks, etc.)
• Appropriate autotests or explanation to why this change has no tests
• For dependency updates: links to external changelogs and, if possible, full diffs

Desired reviewers

[oleg-nenashev]

Just minor comment

[oleg-nenashev]

Looks fine, ready to go?

[oleg-nenashev]

I plan to merge it tomorrow if no negative feedback