title: kaptKotlin gradle task fails on JDK 11
body: <p>FAILURE: Build failed with an exception.</p>
  
  <ul>
  <li>What went wrong:
  Execution failed for task ':module:kaptKotlin'.
  
  <blockquote>
    <p>Could not find tools.jar in system classpath, which is required for kapt to work</p>
  </blockquote></li>
  </ul>