It would be helpful to allow MultiJob Phase invocations to support variable expansion for job name references.

This would be particularly helpful to us for invoking a "branch pipeline" sub-job from a larger encompassing MultiJob configuration. Variable expansion would provide better MultiJob invocation options, including use of a GitParameter plugin selection of a branch to build. Currently, one must statically specify the full JobName with encoded branch reference to invoke a branch pipeline job.

Currently, attempting to use a variable expansion results in the configured job invocation being ignored.