Initial support of annotation loading at runtime

In order to locate an annotated entity, we need to implement almost the whole
Java element model (which will be used anyway for Java descriptor loading)

core/descriptor.loader.java/src/org/jetbrains/kotlin/load/java/structure/JavaMethod.java

@@ -18,11 +18,13 @@ package org.jetbrains.kotlin.load.java.structure;
 
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
+import org.jetbrains.annotations.ReadOnly;
 
 import java.util.List;
 
 public interface JavaMethod extends JavaMember, JavaTypeParameterListOwner {
     @NotNull
+    @ReadOnly
     List<JavaValueParameter> getValueParameters();
 
     boolean hasAnnotationParameterDefaultValue();