Regenerate tests
Fix StackOverflowError on cyclic hierarchy Java<->Kotlin

Report errors not only when superclasses are MutableClassDescriptorLite, but
any classes

 #KT-2115 Fixed
Consider outer classes when topsorting hierarchy

- when building a topsorted hierarchy, consider not only edges to the class'
  superclasses, but also from inner/nested classes to their container. This
  effectively means that a class cannot inherit from its nested class. Similar
  cases (see the tests) are disallowed in Java.
- filter classes by their presence in TopDownAnalysisContext, not by being a
  MutableClassDescriptor (otherwise analysis for local classes ends up trying
  to do something with outer superclasses)
- delete outdated comment: topsort is needed not only for better diagnostics,
  but also for correct order of fake overrides construction
Drop MutableClassDescriptorLite

Inline it into MutableClassDescriptor
Minor, add assertion message
Show uninitialized descriptor's name in DeclarationDescriptor.toString()