fix testsuite configuration

Author: tonicospinelli

phpunit.xml.dist

@@ -3,11 +3,15 @@
 
     <testsuites>
         <testsuite name="Design Patterns">
-            <directory>./Behavioral/*/*Test.php</directory>
-            <directory>./Creational/*/*/Test.php</directory>
-            <directory>./More/*/*/Test.php</directory>
-            <directory>./Structural/*/*/Test.php</directory>
+            <directory suffix="Test.php">Behavioral</directory>
+            <directory suffix="Test.php">Creational</directory>
+            <directory suffix="Test.php">More</directory>
+            <directory suffix="Test.php">Structural</directory>
         </testsuite>
     </testsuites>
-
+    <filter>
+        <blacklist>
+            <directory>./vendor</directory>
+        </blacklist>
+    </filter>
 </phpunit>