title: phpunit xml configuration colors instruction dosen't work
body: <p>I define a <strong>phpunit.xml</strong> configuration file for my unit tests. In this file I instruct to show colors in the unit tests results like this:</p>
  
  <pre><code>&lt;phpunit
     ... 
     colors="true"
     ... 
  &lt;/phpunit&gt;
  </code></pre>
  
  <p>When I run the tests in the command line it is all ok, except that I get no green and red colors in the results.</p>
  
  <p>If I delete the configuration file and use the parameter <code>--color=always</code> in the command line then I get the result with colors.</p>
  
  <p>In the configuration file I already try to change <code>colors="true"</code> to <code>colors="always"</code> with no result.</p>
  
  <p>Is any problem with my configuration file?</p>
  
  <p>Here is my phpunit.xml configuration file:</p>
  
  <pre><code>&lt;phpunit
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/5.1/phpunit.xsd"
    backupGlobals="true"
    backupStaticAttributes="false"
    cacheTokens="false"
    colors="true"
    convertErrorsToExceptions="true"
    convertNoticesToExceptions="true"
    convertWarningsToExceptions="true"
    forceCoversAnnotation="false"
    mapTestClassNameToCoveredClassName="false"
    printerClass="PHPUnit_TextUI_ResultPrinter"
    processIsolation="false"
    stopOnError="false"
    stopOnFailure="false"
    stopOnIncomplete="false"
    stopOnSkipped="false"
    stopOnRisky="false"
    testSuiteLoaderClass="PHPUnit_Runner_StandardTestSuiteLoader"
    timeoutForSmallTests="1"
    timeoutForMediumTests="10"
    timeoutForLargeTests="60"
    verbose="false"&gt;
   &lt;testsuites&gt;
     &lt;testsuite name="examples"&gt;
       &lt;directory&gt;/home/miguelbgouveia/Documents/projects/joomla/tests&lt;/directory&gt;
       &lt;file&gt;test_example.php&lt;/file&gt;
     &lt;/testsuite&gt;
   &lt;/testsuites&gt;
  &lt;/phpunit&gt;
  </code></pre>
  
  <p>And the version of phpunit is 5.1.2</p>