use namespace for kerio api

app/Http/Actions/TestConnection.php

@@ -18,7 +18,7 @@ use ThurData\Servers\KerioEmail\Api\KerioConnectApi;
 class TestConnection extends AddonController
 {
 
-    use ExtensionsCheckerTrait;
+//    use ExtensionsCheckerTrait;
     /**
      *
      *