Inter module deps fix

We ran into an issue where some intermodule dependencies were intentionally defined to use a previous version of the project for backwards compatibility tests.  This change causes the extension to only make a change to the version if the original groupId, artifactId, **and version**, match one of the reactor projects.

I had to update several of the tests with this change, but as far as I can tell, the extenal behaviour of the plugin was not changed to cause any other use cases to break.