Changes related to DIP upload process, refs #7641

Include qtSwordPluginWorker in new jobs process:
- Add ability if qtSwordPlugin is enabled
- Use new job classes

Fixes in DIP upload process:
- Do not save target IO at the end, it was creating nested set problems, but update it in the ES index
- Register namespaces and use Xpath queries to allow namespaced and not namespaced METS versions
I had a conflict thinking about that. I'd like to see all jobs in one place too, but this one is closely related with the work that plugin does. And we'll still need an 'if' to check in the plugin is enabled (it's disabled by default) before adding the ability.