Added proper status code for all the api modules

app/Http/Controllers/ModulePlantLineController.php

@@ -39,7 +39,7 @@ class ModulePlantLineController extends Controller
             return response()->json([
                 'status_code' => 'ERROR',
                 'status_description' => "Plant Name can't be empty!"
-            ], 400);
+            ], 404);
         }
 
         $plant = Plant::where('name', $plantName)->first();