N°4624 align phpunit annotations

Remove processIsolation when not needed
When needed, make sure to have also their counterpart (preserveGlobalState and backupGlobals)

test/core/CMDBSource/CMDBSourceTest.php

@@ -13,11 +13,6 @@ use utils;
  * @package Combodo\iTop\Test\UnitTest\Core
  */
 
-/**
- * @runTestsInSeparateProcesses
- * @preserveGlobalState disabled
- * @backupGlobals disabled
- */
 class CMDBSourceTest extends ItopTestCase
 {
 	protected function setUp()