GDA-6009 (8.40) Remove need for -Dgda.dls-config in preparation for standardisation.
GDA-6009 (8.40) Move dls-config java.properties into mode subdirectories.
GDA-6009 (8.40) Adjust for dls-config java.properties in mode subdirectories.
Merge branch 'gda-8.40+GDA-6009'