Whitelist nodes in llmq-dkgerrors.py (#3112)

This avoids banning due to invalid sigs

Author: codablock

test/functional/llmq-dkgerrors.py

@@ -15,7 +15,7 @@
 
 class LLMQDKGErrors(DashTestFramework):
     def set_test_params(self):
-        self.set_dash_test_params(6, 5, [], fast_dip3_enforcement=True)
+        self.set_dash_test_params(6, 5, ["-whitelist=127.0.0.1"], fast_dip3_enforcement=True)
 
     def run_test(self):