FLUID-5375: Modified a unit test to demonstrate 5375 issue.

FLUID-5375 report: http://issues.fluidproject.org/browse/FLUID-5375

The branch for this pull request is based off the other pull request that has the latest changes for model listeners: https://github.com/fluid-project/infusion/pull/520

This pull request should only be merged into the master with a fix for itself.