refactor - _is_timed_out using instance timeout

Each _is_timed_out client specified self.timeout as timeout parameter.
As _is_timed_out is an instance method, timeout parameter could be
retrieved from the object itself.

Change-Id: I56c6d5a21a36cf052d3bde86c454d7be72b22a7c
Merge "refactor - _is_timed_out using instance timeout"