M0 issue on reprocessing

[jan-petr]

Description

When x.M0 = "Absent", if you only delete the lock directories without deleting the ASL_1 directory before re-running the ASL Module, the processing will be different because it with have already detected an M0.nii file in the ASL_1 folder.

We need to detect x.M0 absent and then remove the M0.nii file while cleaning.

Tasks

• Fix xyz in function xASL_[abc]_...

How to test

Optional: insert description about how to test the code changes here

Release notes

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