added aps info for Smilei small case

Smilei/testcase_small/aps.slurm

+#!/bin/bash
+#SBATCH --nodes=50
+#SBATCH --ntasks-per-node=2
+#SBATCH --threads-per-core=1
+#SBATCH --cpus-per-task=14
+#SBATCH -J tst_accelec
+#SBATCH --constraint=BDW28
+#SBATCH --time=01:30:00
+#SBATCH --output=small_test.out
+
+## Set the working dir to the dir in which the submission was called.
+
+source env_bench
+module load vtune/2018.0
+
+export OMP_NUM_THREADS=$SLURM_CPUS_PER_TASK
+export KMP_AFFINITY=granularity=fine,compact,1,0,verbose
+
+mkdir -p small_output
+cd small_output
+
+srun --mpi=pmi2 -K1 -m block:block -c $SLURM_CPUS_PER_TASK --resv-ports -n $SLURM_NTASKS aps $EXE $SMILEI_DIR/testcase_small/test.py