put back the propagation of --jobs to run heavy_tests in serial (#143)

.CI/Jenkinsfile

@@ -771,7 +771,7 @@ def runRegressiontest(branch, name, extraFlags, omsHash, dbPrefix, sshConfig, om
   export HOME="${libraryPath}"
   cd OpenModelicaLibraryTesting
   # Force /usr/bin/omc as being used for generating the mos-files. Ensures consistent behavior among all tested OMC versions
-  stdbuf -oL -eL time ./test.py --ompython_omhome=/usr ${FMI_TESTING_FLAG} --extraflags='${extraFlags}' --extrasimflags='${extrasimflags}' --branch="${name}" --output="libraries.openmodelica.org:/var/www/libraries.openmodelica.org/branches/${name}/" --libraries='${libraryPath}/.openmodelica/libraries/' ${libs_config_file} ${params.OLDLIBS ? "configs/conf-old.json configs/conf-nonstandard.json" : ""} || (killall omc ; false) || exit 1
+  stdbuf -oL -eL time ./test.py --ompython_omhome=/usr ${FMI_TESTING_FLAG} --extraflags='${extraFlags}' --extrasimflags='${extrasimflags}' --branch="${name}" --output="libraries.openmodelica.org:/var/www/libraries.openmodelica.org/branches/${name}/" --libraries='${libraryPath}/.openmodelica/libraries/'  --jobs=${jobs} ${libs_config_file} ${params.OLDLIBS ? "configs/conf-old.json configs/conf-nonstandard.json" : ""} || (killall omc ; false) || exit 1
   """
   sh 'date'
   sh "rm -f OpenModelicaLibraryTesting/${dbPrefix}-sqlite3.db.tmp"