added auto port find

pytorch_lightning/models/trainer.py

@@ -403,7 +403,7 @@ class Trainer(TrainerIO):
             try:
                 port = os.environ['MASTER_PORT']
             except Exception as e:
-                port = 12910
+                port = 12801
                 os.environ['MASTER_PORT'] = f'{port}'
 
         # check for pids