Issue #128: Update phpunit.xml.dist.

phpunit.xml.dist

 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit bootstrap="build/core/tests/bootstrap.php" backupGlobals="false" colors="true" >
+<phpunit bootstrap="vendor/autoload.php" backupGlobals="true" colors="true" >
   <php>
     <ini name="error_reporting" value="32767"/>
+    <var name="namespaces" value=""/>
     <ini name="memory_limit" value="-1"/>
     <env name="SIMPLETEST_DB" value="mysql://travis:@127.0.0.1/drupal"/>
   </php>