xbt_dict_set(props, exist, xbt_strdup("250"), xbt_free_f);
/* Test if we have changed the value */
value = MSG_host_get_property_value(host1, exist);
xbt_dict_set(props, exist, xbt_strdup("250"), xbt_free_f);
/* Test if we have changed the value */
value = MSG_host_get_property_value(host1, exist);