Turning on Workspace->General->Refresh automatically causes seam-gen projects to re-explode every few seconds

If you enable the automatic workspace refresh (which keeps your file exporer in sync with the filesystem) on a seam-gen project, it causes the build process (and the re-explode to the server) to re-run every 5 seconds, even though the filesystem itself has not changed.

To reproduce:

1. Open a seam-gen project with Jboss tools.
2. Enable automatic refresh (Preferences->General->Workspace, Refresh automatically)

You will now see the explode happen in the console window every few seconds.