fix(webservice): Namespaces and redundancies

redundant require statements, clean up install trait, standardize trait names, remove hard-coded php version require for composer.json

ws_orderreference.php

@@ -4,17 +4,14 @@ if (!defined('_PS_VERSION_')) {
     exit;
 }
 
-use Module\WsOrderreference\Module\Install;
-use Module\WsOrderreference\Module\displayHooks;
-use Module\WsOrderreference\Module\actionHooks;
-
+use Websmid\WsOrderReference\Module\Install;
+use Websmid\WsOrderReference\Module\displayHooks;
+use Websmid\WsOrderReference\Module\actionHooks;
 
 if (file_exists(__DIR__ . '/vendor/autoload.php')) {
     require_once __DIR__ . '/vendor/autoload.php';
 }
 
-require_once __DIR__ . '/classes/WebserviceSpecificManagementOrderreference.php';
-
 class Ws_OrderReference extends Module
 {
     /** @var OrderReferenceRepository */
@@ -24,6 +21,7 @@ class Ws_OrderReference extends Module
     use displayHooks;
     use actionHooks;
 
+
     public function __construct()
     {
         $this->name = 'ws_orderreference';