Hi there,

we added a method to the jenkins core (class Run) to force the change of the build result.
Currently the build result can't be changed after build has finished.

Reason for that method:
In our environment we trigger an external framework. After a build is finished, the real progress hasn't finished yet after all. The progress need really very long to finish (up to some hours). We developed a plugin to change the build result, after we get a response of that framework. But this only works, if we can change the build result after the build has finished.

It would be very nice to see that method in the official core.

See: https://github.com/jenkinsci/jenkins/pull/1792