Chunk server: fix reply content handling with meta server protocol state machine, by leaving in flight op in the dispatch queue until reply received completely. Do not delete in flight op if receiving reply.
Meta server: fix authenticated id assignment in chunk server protocol state machine. Fix chunk access info creation with write lease renew. Fix op response chandler invocation with chunk server protocol state machine, that was causing empty responses with write lease renew. Declare MetaRequest::response(ostream&) protected to catch possible bogus invocations.
Chunk server and qfs tool: revert unintentional commit of test / debug code.