(robot-system-check-base) update to include storing ssh connection, return value update at 0fd2b02f57791ba1c6945bcd3d2110125e9ebb95
(robot-system-check-base) update to avoid ImportError.
Merge pull request #221 from 130s/ichecker_improve

(robot-system-check-base) update to include storing ssh connection, return value update