Use two-phase migration only for warm migration

app/models/service_template_transformation_plan_task.rb

@@ -345,7 +345,7 @@ def conversion_options_source_provider_vmwarews_vddk(_storage)
         :query    => { :no_verify => 1 }.to_query
       ).to_s,
       :vmware_password      => source.host.authentication_password,
-      :two_phase            => true,
+      :two_phase            => warm_migration?,
       :warm                 => warm_migration?,
       :daemonize            => false
     }