Fix HooksTest compile: access RunnableWrapper via package-private + reflection for resetOnScheduleHook

Author: trask

instrumentation/reactor/reactor-3.1/library/src/main/java/io/opentelemetry/instrumentation/reactor/v3_1/ContextPropagationOperator.java

@@ -388,7 +388,7 @@ public Object scanUnsafe(Scannable.Attr attr) {
     }
   }
 
-  private static class RunnableWrapper implements Runnable {
+  static class RunnableWrapper implements Runnable {
     private final Runnable delegate;
     private final Context context;
 

instrumentation/reactor/reactor-3.1/library/src/test/java/io/opentelemetry/instrumentation/reactor/v3_1/HooksTest.java

@@ -40,10 +40,12 @@ class HooksTest {
               TraceState.getDefault()));
 
   @AfterEach
-  void resetHooks() {
+  void resetHooks() throws ReflectiveOperationException {
     Hooks.resetOnEachOperator(TracingSubscriber.class.getName());
     if (schedulerHooksSupported()) {
-      Schedulers.resetOnScheduleHook(RunnableWrapper.class.getName());
+      Schedulers.class
+          .getMethod("resetOnScheduleHook", String.class)
+          .invoke(null, ContextPropagationOperator.RunnableWrapper.class.getName());
     }
   }