When creating remote zip files, Xray tasks must wait a few seconds to make sure that the ZIP is properly created

When creating remote zip files, the plugin tasks must wait a few seconds to make sure that the ZIP is properly created.

Jenkins Java API creating a zip in a remote node is totally asynchronous and does not fire any kind of event or callback making it impossible to know when a ZIP file finished to be created.

The solution would be to add a small waiting period after creating the ZIP file.