title: Preventing checkstyle from running in a specific maven submodule
body: <p>I would like to define a checkstyle run in a pom file, and have it run on all the submodules <em>except</em> certain specified ones. </p>
  
  <p>In other words, I need some sort of <code>&lt;excludes&gt;</code> (which exists but applies to filenames) but which targets modules. Any idea anyone?</p>