I've enabled violations plugin in a new maven multi module project, but the
graphs on the project main page don't show up and the link goes to a dead (404)
page.

I've found I need to go into all of the sub modules and enable violations on
each module for this to work correctly (even though without enabling violations
per module the per build results where still present for each module).

The Tasks plugin and other native Maven2 plugins don't seem to require this.

Violations 0.7 Hudson 1.222