Tests: Make sure "resourcefound" listener is always removed
Tests: Make sure "resourcefound" listener is always removed

zqzhang/iotivity-node,zqzhang/iotivity-node,zqzhang/iotivity-node,zolkis/iotivity-node,zolkis/iotivity-node,zolkis/iotivity-node,zqzhang/iotivity-node,zolkis/iotivity-node,zqzhang/iotivity-node,zolkis/iotivity-node