Force sfciqmc test to be launched in serial only.
Force sfciqmc test to be launched in serial only.

Previously this was done by setting processors=1, but testcode.py uses
mpirun to launch the executable if processors is a positive integer.

hande-qmc/hande,ruthfranklin/hande,hande-qmc/hande,hande-qmc/hande,hande-qmc/hande,hande-qmc/hande