network: modify redefinition in nettest stress
network: modify redefinition in nettest stress

callback functions in nettest program should be static function.

pillip8282/TizenRT,junmin-kim/TizenRT,jsdosa/TizenRT,jeongarmy/TizenRT,sunghan-chang/TizenRT,junmin-kim/TizenRT,jsdosa/TizenRT,Samsung/TizenRT,davidfather/TizenRT,Samsung/TizenRT,pillip8282/TizenRT,jeongchanKim/TizenRT,chanijjani/TizenRT,sunghan-chang/TizenRT,davidfather/TizenRT,jeongarmy/TizenRT,jsdosa/TizenRT,junmin-kim/TizenRT,an4967/TizenRT,davidfather/TizenRT,junmin-kim/TizenRT,an4967/TizenRT,sunghan-chang/TizenRT,pillip8282/TizenRT,jeongchanKim/TizenRT,pillip8282/TizenRT,junmin-kim/TizenRT,chanijjani/TizenRT,Samsung/TizenRT,an4967/TizenRT,jeongchanKim/TizenRT,Samsung/TizenRT,chanijjani/TizenRT,jsdosa/TizenRT,jeongchanKim/TizenRT,an4967/TizenRT,Samsung/TizenRT,sunghan-chang/TizenRT,sunghan-chang/TizenRT,an4967/TizenRT,chanijjani/TizenRT,pillip8282/TizenRT,jsdosa/TizenRT,jeongarmy/TizenRT,jeongarmy/TizenRT,jeongchanKim/TizenRT,jeongarmy/TizenRT,jeongchanKim/TizenRT,davidfather/TizenRT,chanijjani/TizenRT,pillip8282/TizenRT,an4967/TizenRT,jeongchanKim/TizenRT,pillip8282/TizenRT,sunghan-chang/TizenRT,junmin-kim/TizenRT,chanijjani/TizenRT,jeongarmy/TizenRT,sunghan-chang/TizenRT,chanijjani/TizenRT,Samsung/TizenRT,jsdosa/TizenRT,davidfather/TizenRT,davidfather/TizenRT,junmin-kim/TizenRT,an4967/TizenRT,davidfather/TizenRT,jeongarmy/TizenRT,jsdosa/TizenRT,Samsung/TizenRT