Enabled composer load support in migration

migrate/index.php

@@ -10,6 +10,11 @@
 
 chdir (dirname(__FILE__) . '/..');
 include_once 'vtigerversion.php';
+
+if (file_exists("vendor/autoload.php")) {
+    require_once "vendor/autoload.php";
+}
+
 include_once 'data/CRMEntity.php';
 include_once 'includes/main/WebUI.php';