- adding a force/clear equivalent for spins in verlet/kk

- setting all validation problems for spin/kk

examples/SPIN/test_problems/validation_nve/in.spin.iron-nve

@@ -50,5 +50,5 @@ thermo          200
 compute 	outsp all property/atom spx spy spz sp fmx fmy fmz
 dump 		1 all custom 10 dump_iron.lammpstrj type x y z c_outsp[1] c_outsp[2] c_outsp[3]
 
-# run 		100000
-run 		10000
+run 		100000
+# run 		1

examples/SPIN/test_problems/validation_nve/run-test-nve.sh

@@ -3,10 +3,14 @@
 # clean old res
 rm res_*.dat
 
-# compute Lammps 
+# test standard Lammps 
+../../../../src/lmp_serial -in in.spin.iron-nve 
+
+# test spin/kk with Kokkos Lammps
 # mpirun -np 1 ../../../../src/lmp_kokkos_mpi_only \
 #   -k on -sf kk -in in.spin.iron-nve
-../../../../src/lmp_serial -in in.spin.iron-nve 
+
+# extract data from Lammps run
 in="$(grep -n Step log.lammps | awk -F ':' '{print $1}')"
 en="$(grep -n Loop log.lammps | awk -F ':' '{print $1}')"
 in="$(echo "$in+1" | bc -l)"