Remove the flaky testCustomSCMName

[MarkEWaite]

Remove the flaky testCustomSCMName

Not valuable enough to have it distract from other development.

The test was ignored for the longest time. That generated a warning in the logs but was not investigated for the root cause of the erratic behavior. Other fixes are more valuable than being distracted by this.

Checklist

• I have read the CONTRIBUTING doc
• Unit tests pass locally with my changes
• I have added documentation as necessary
• No Javadoc warnings were introduced with my changes
• No spotbugs warnings were introduced with my changes
• Documentation in README has been updated as necessary
• Online help has been added and reviewed for any new or modified fields
• Any dependent changes have been merged and published in upstream modules (like git-client-plugin)

Types of changes

• Dependency or infrastructure update