Add try/catch to prevent coredump on invalid user name/pathes in configuration file

    loggers::get_instance().warning("security_services::setup: Already done");

    return 0;

  }

  _setup_done = true;

  // Build the certificate caching

  try {

    _security_db.reset(new security_db(_params[params::sec_db_path]));

    if (_security_db.get() == nullptr) { // Memory allocation issue

      loggers::get_instance().warning("security_services::setup: _security_db pointer is NULL");

      return -1;

    }

    _setup_done = true;

  } catch(...) {

    loggers::get_instance().error("security_services::setup: Filesystem access error, terminate test suite on TTCN-3 error. Please check user name and paths in the test suite configuration file.");

    return -1;

  }

  // Initialise encryption mechanism

  if (_params[params::encrypted_mode].compare("1") == 0) {