Fix tests for jdk 11

GitOrigin-RevId: 4fe5d82f3562312c199aa24cefc4dc14e8305653

java/compiler/instrumentation-util/src/com/intellij/compiler/instrumentation/InstrumentationClassFinder.java

@@ -85,6 +85,10 @@ public class InstrumentationClassFinder {
 
       @Override
       protected Class findClass(String name) throws ClassNotFoundException {
+        Class aClass = InstrumentationClassFinder.this.findClass(name);
+        if (aClass != null) {
+          return aClass;
+        }
         final InputStream is = lookupClassBeforeClasspath(name.replace('.', '/'));
         if (is == null) {
           throw new ClassNotFoundException("Class not found: " + name.replace('/', '.'));  // ensure presentable class name in error message
@@ -106,6 +110,10 @@ public class InstrumentationClassFinder {
     return loader;
   }
 
+  protected Class findClass(String name) {
+    return null;
+  }
+
   public void releaseResources() {
     myPlatformClasspath.releaseResources();
     myClasspath.releaseResources();