FIX: Prescription to wrong medical files
FIX: Prescription to wrong medical files

Fixed a bug where the patient's id would be used in place of the medical
file's id to add a new treatment (and its prescriptions).

This bug has now been fixed by first looking up the file's id before any modifying call is made to the API.

dburihabwa/lifelab-rest,dburihabwa/lifelab-rest,dburihabwa/lifelab-rest,dburihabwa/lifelab-rest