chore: change some variable name

Author: giacomoaccursi

flows.json

@@ -599,7 +599,7 @@
         "type": "function",
         "z": "09012e75c72a4968",
         "name": "getRoomIDAndActuatorType",
-        "func": "let jsonData = JSON.parse(msg.payload);\nmsg.roomID = jsonData[msg.actuator_id][\"room\"]\nmsg.type = jsonData[msg.actuator_id][\"type\"]\nreturn msg;",
+        "func": "let jsonData = JSON.parse(msg.payload);\nmsg.room_id = jsonData[msg.actuator_id][\"room\"]\nmsg.type = jsonData[msg.actuator_id][\"type\"]\nreturn msg;",
         "outputs": 1,
         "noerr": 0,
         "initialize": "",
@@ -638,7 +638,7 @@
         "type": "function",
         "z": "09012e75c72a4968",
         "name": "getSerial",
-        "func": "let jsonData = JSON.parse(msg.payload);\nmsg.serial = jsonData[msg.room]\nreturn msg;",
+        "func": "let jsonData = JSON.parse(msg.payload);\nmsg.serial = jsonData[msg.room_id]\nreturn msg;",
         "outputs": 1,
         "noerr": 0,
         "initialize": "",
@@ -1316,7 +1316,7 @@
         "z": "09012e75c72a4968",
         "name": "",
         "serial": "94b8abb47e4cb1f2",
-        "x": 2150,
+        "x": 2070,
         "y": 1280,
         "wires": []
     },