lpcmanager

Many small fixes. Mostly typos and forgotten things while splitting LPCManager.py. Reached a point where LPCManager starts again when launched from batch script. Matches with beremiz changeset 7e6b03251bfe.
rt_task_delete(&UART_task);
rt_task_join(&UART_task);
closeserial(UART_fd);
gpio_close(RS485_GPIO_dev);
rt_mutex_delete(&UART_WriteMutex);
rt_mutex_delete(&UART_ReadMutex);