[FIX] IoT : Variable name correction

This commit replace "data" by "iot_box" which is more representative
of the values it contains

addons/hw_drivers/controllers/driver.py

@@ -278,7 +278,7 @@ class Manager(Thread):
                 }
             data = {
                 'params': {
-                    'data' : iot_box,
+                    'iot_box' : iot_box,
                     'devices' : devices_list,
                 }
             }