Change default removal of payloads after submission

[RenateS]

In the file based back end integrator the current default is that after submission, files are not removed unless the back end system instructs Holodeck B2B to do so.
This can cause disk space to run out if the back end system does not do this (or not properly).
Sent payloads must then be removed manually or using a script.
Solution: Switch to default file removal after submission.