add new regression test class: parallel

this compares the output of a serial and a parallel
run for a simulation

tests/run-parallel-regressionTest.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+set -e
+
+INPUT_DATA_PATH="$1"
+RESULT_PATH="$2"
+BINPATH="$3"
+FILENAME="$4"
+ABS_TOL="$5"
+REL_TOL="$6"
+COMPARE_SUMMARY_COMMAND="$7"
+COMPARE_ECL_COMMAND="$8"
+EXE_NAME="${9}"
+shift 9
+TEST_ARGS="$@"
+
+rm -Rf ${RESULT_PATH}
+mkdir -p ${RESULT_PATH}
+cd ${RESULT_PATH}
+${BINPATH}/${EXE_NAME} ${TEST_ARGS}.DATA linear_solver_reduction=1e-7 tolerance_cnv=5e-6 tolerance_mb=1e-8
+mkdir mpi
+cd mpi
+mpirun -np 4 ${BINPATH}/${EXE_NAME} ${TEST_ARGS}.DATA linear_solver_reduction=1e-7 tolerance_cnv=5e-6 tolerance_mb=1e-8
+cd ..
+
+${COMPARE_SUMMARY_COMMAND} -R ${RESULT_PATH}/${FILENAME} ${RESULT_PATH}/mpi/${FILENAME} ${ABS_TOL} ${REL_TOL}
+${COMPARE_ECL_COMMAND} -l ${RESULT_PATH}/${FILENAME} ${RESULT_PATH}/mpi/${FILENAME} ${ABS_TOL} ${REL_TOL}