BLXVIIIB-197 use new fast forward (finish early request) in scanning mechanism
add to logging to help find issues
stop motion if scan requested to finish early
Merge branch 'gda-8.40' of ssh://dascgitolite@dasc-git.diamond.ac.uk/gda/gda-core.git into gda-8.40
Merge remote-tracking branch 'origin/gda-8.40'