Fix based on feedback

Author: brfrn169

core/src/test/java/com/scalar/db/transaction/consensuscommit/ParallelExecutorTest.java

@@ -702,15 +702,16 @@ public void executeTasks_ParallelTrueAndStopOnErrorTrue_ExceptionThrown_ShouldSt
                 parallelExecutor.executeTasks(
                     mixedTasks, parallel, noWait, stopOnError, "test", TX_ID));
 
-    if (exception == executionException1) {
-      assertThat(exception)
-          .isEqualTo(executionException1)
-          .hasSuppressedException(executionException2);
-    } else {
-      assertThat(exception)
-          .isEqualTo(executionException2)
-          .hasSuppressedException(executionException1);
-    }
+    assertThat(exception)
+        .satisfiesAnyOf(
+            e ->
+                assertThat(e)
+                    .isEqualTo(executionException1)
+                    .hasSuppressedException(executionException2),
+            e ->
+                assertThat(e)
+                    .isEqualTo(executionException2)
+                    .hasSuppressedException(executionException1));
 
     verify(parallelExecutorService, times(mixedTasks.size())).execute(any());
   }