Handle pair state moved-created as a conflict

UnknownPairState: Unknown pair state for 'moved' and 'created'
  File "nxdrive/engine/watcher/local_watcher.py", line 414, in _scan_recursive
    dao.update_local_state(doc_pair, child_info)
  File "nxdrive/engine/dao/sqlite.py", line 964, in update_local_state
    row.pair_state = self._get_pair_state(row)
  File "nxdrive/engine/dao/sqlite.py", line 939, in _get_pair_state
    raise UnknownPairState(row.local_state, row.remote_state)

Error during recursive scan of PosixPath('/path/document.doc'), ignoring until next full scan