Fix ambiguity when KtUltraLightClass contains overrides

#KT-27987 Fixed

compiler/light-classes/src/org/jetbrains/kotlin/asJava/classes/ultraLightPsi.kt

@@ -616,6 +616,8 @@ internal class KtUltraLightMethod(
         list
     }
 
+    override fun getHierarchicalMethodSignature() = PsiSuperMethodImplUtil.getHierarchicalMethodSignature(this)
+
     override fun getThrowsList(): PsiReferenceList = _throwsList
 }