CORE-6039 removed bogus dependencies
CORE-6039 consolidated filesystem client logic

The donkey.util.nibblonian code that uses filesystem namespaces was moved into donkey.clients.nibblonian.
CORE-6039 renamed util.nibblonian to util.tree-url

Only tree URL formatting code remains in the namespace
CORE-6039 removed dead code and aliased namespaces
CORE-6039 renamed clients.nibblonian to clients.data-info
CORE-6039 renamed nibblonian to data-info

This was done everywhere but the java property names and some examples where it didn't matter.