[FIX] RefStrmObsolCls-tk ( conflicts with m17n changes )

[denker at iam.unibe.ch]

Checking RefStrmObsolCls-tk.cs (#5976) for method conflicts with
changesets after 5977DefaultChangeSetName-nk ...
...checking SmartRefStream>>writeClassRenameMethod:was:fromInstVars:
CONFLICT found for SmartRefStream
class>>writeClassRenameMethod:was:fromInstVars: with newer changeset
6113-0292dontAsk-ar
...checking SmartRefStream>>mapClass:
1 conflict found.