Rename SystemDictionary::parse_stream

This function is used to call the classfile parser for hidden or anonymous classes, and for use with jvmti RedefineClasses. The latter only calls KlassFactory::create_from_stream and skips the rest of the code in SystemDictionary::parse_stream.

Renamed SystemDictionary::parse_stream -> resolve_hidden_class_from_stream
resolve_from_stream -> resolve_class_from_stream
and have SystemDictionary::resolve_from_stream() call the right version depending on ClassLoadInfo flags.

So the external API is resolve_from_stream.