chore: update stress test expectations

Some tests have too strict expectations on mutator output and are way
off from their true probabilities, and simply running the stress test for
more iterations, or with a different seed will result in failed tests
due to variance.

Author: oetr

src/test/java/com/code_intelligence/jazzer/mutation/mutator/StressTest.java

@@ -837,15 +837,15 @@ void singleParam(int parameter) {}
             "[Nullable<[Integer, Boolean] -> SimpleRecord>, Nullable<[Integer, Boolean] ->"
                 + " SimpleRecord>] -> RepeatedRecord",
             true,
-            distinctElementsRatio(0.49),
+            distinctElementsRatio(0.45),
             manyDistinctElements()),
         arguments(
             new TypeHolder<@NotNull LinkedListNode>() {}.annotatedType(),
             "[Nullable<[Integer, Boolean] -> SimpleRecord>, Nullable<RecursionBreaking((cycle) ->"
                 + " LinkedListNode)>] -> LinkedListNode",
             false,
             // Low due to recursion breaking initializing nested records to null.
-            distinctElementsRatio(0.23),
+            distinctElementsRatio(0.22),
             manyDistinctElements()),
         arguments(
             new TypeHolder<@NotNull SetterBasedBeanWithParent>() {}.annotatedType(),
@@ -858,7 +858,7 @@ void singleParam(int parameter) {}
             "[Nullable<RecursionBreaking((cycle) -> LinkedListBean)>, Integer] -> LinkedListBean",
             false,
             // Low due to recursion breaking initializing nested structs to null.
-            distinctElementsRatio(0.22),
+            distinctElementsRatio(0.21),
             manyDistinctElements()),
         arguments(
             new TypeHolder<@NotNull ImmutableBuilder>() {}.annotatedType(),