emma plugin does not expand job parameters for report search path

Most of the project configuration fields allow you to reference parameterized build parameters using either the $PARAM or ${PARAM} syntax. It does not seem that the emma report search path field is doing parameter expansion before passing the value to the emma plugin for processing.

This is a minor inconvenience, as it means that I need to make copies of the Jenkins job to process different sets of emma reports, rather than being able to use job parameterization.