[test][prefix] Rename invalid_loop_output to invalid_loop_validate_output

This reflects more correctly what the test
is about.

beat/backend/python/test/prefix/algorithms/autonomous/invalid_loop_output/1.py → beat/backend/python/test/prefix/algorithms/autonomous/invalid_loop_validate_output/1.py

@@ -35,7 +35,6 @@
 
 
 class Algorithm:
-
     def validate(self, result):
         value = result.value
 

beat/backend/python/test/test_loop_executor.py

@@ -151,6 +151,7 @@ class TestExecution(unittest.TestCase):
         self.writeData("in", [(0, 0), (1, 1), (2, 2), (3, 3)], 1000)
 
         # -------------------------------------------------------------------------
+
         config = deepcopy(CONFIGURATION)
         config["algorithm"] = algorithm_name
         config["loop"]["algorithm"] = loop_algorithm_name
@@ -228,6 +229,8 @@ class TestExecution(unittest.TestCase):
     def test_sequential_loop_user(self):
         self.process("sequential/loop_user/1", "autonomous/loop/1")
 
-    def test_autonomous_loop_invalid_output(self):
+    def test_autonomous_loop_invalid_validate_output(self):
         with self.assertRaises(RemoteException):
-            self.process("autonomous/loop_user/1", "autonomous/invalid_loop_output/1")
+            self.process(
+                "autonomous/loop_user/1", "autonomous/invalid_loop_validate_output/1"
+            )