title: Don't fail the gradle build if a test is failing with the gradle-android-test-plugin
body: <p>I set my project up to run with Robolectric and the the <a href="https://github.com/JakeWharton/gradle-android-test-plugin">gradle-android-test-plugin</a>.
  This all works fine and first tests are running and failing. </p>
  
  <p>If a test fails this will also fail the gradle build. Is there a way to just let the build go on and write down the failing tests for evaluation in a later step? </p>
  
  <p>The plan is to integrate the testing in a continuous integration server and there the build should only be unstable if a test fails. </p>