title: Disable pylint message for a given module or directory
body: <p>Is there a way to disable Pylint's <code>duplicate-code</code> message just for test files? All of the tests in our project are DAMP so the duplicated code is by design. I understand we can add <code># pylint: disable=duplicate-code</code> throughout our tests, but would rather add some sort of rule that says all files under a <code>test/</code> folder will have this rule disabled. Is there a way to do this? </p>
  
  <p>To be more specific, I'm looking for something different from a 'run it twice' solution (which is what I've already fallen back on).</p>