title: gradle junit test report is not in xml format
body: <p>I'm setting up CI for an Android gradle project.  To report back into CI I need the standard junit xml formatted report file.</p>
  
  <p>On test failure this is the output I get</p>
  
  <pre><code>* What went wrong:
  Execution failed for task ':Mobile Application:testDevelopmentDebugUnitTest'.
  &gt; There were failing tests. See the report at:         file://path/build/reports/tests/developmentDebug/index.html
  </code></pre>
  
  <p>When I search under the build path for any xml files none exist.  </p>
  
  <p>I'm using 3.3. version of gradle
  and here are some of the pertinent build.gradle details</p>
  
  <pre><code>android {
      dependencies {
  
          //test project dependencies
          androidTestCompile 'com.android.support:support-annotations:23.2.0'
          androidTestCompile 'com.android.support.test:runner:0.4.1'
          androidTestCompile 'com.android.support.test:rules:0.4.1'
  
          // Optional -- UI testing with Espresso
          androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.2'
          // Required -- JUnit 4 framework
          testCompile 'junit:junit:4.12'
      }
  }
  </code></pre>
  
  <p>Not sure what I'm missing in order to get a junit formatted xml report.</p>