MCLOUD-13147: Upgraded the PHPUnit config files

Author: prateek-karanpuria-adobe

tests/unit/phpunit.xml.dist

@@ -12,14 +12,11 @@
             <directory suffix="Test.php">../../src/Test/Unit</directory>
         </testsuite>
     </testsuites>
-    <filter>
-        <whitelist addUncoveredFilesFromWhitelist="true">
-            <directory suffix=".php">../../src</directory>
-            <exclude>
-                <directory>../../src/Test</directory>
-            </exclude>
-        </whitelist>
-    </filter>
+    <source>
+        <include>
+            <directory>../../src</directory>
+        </include>
+    </source>
 
     <php>
         <ini name="date.timezone" value="UTC"/>