Feature/merge 3 0 develop (#298)

* merging 3.0 into develop

* N°5102 - Allow to send emails (eg. notifications) using GSuite SMTP and OAuth
* migration to iTop 3.1

Co-authored-by: Eric Espie <eric.espie@combodo.com>

test/ItopDataTestCase.php

@@ -785,6 +785,7 @@ class ItopDataTestCase extends ItopTestCase
 		// Create a specific organization for the tests
 		$oOrg = $this->CreateOrganization('UnitTestOrganization');
 		$this->iTestOrgId = $oOrg->GetKey();
+		return $oOrg;
 	}
 
 	/**