Add expected return code arg to sys() to except on remote cmd failure
Add expected return code arg to sys() to except on remote cmd failure

sjones4/eutester,sjones4/eutester,sjones4/eutester,nagyistoce/eutester,sjones4/eutester,nephomaniac/nephoria,nephomaniac/eutester,tbeckham/eutester,nagyistoce/eutester,tbeckham/eutester,shaon/eutester,nagyistoce/eutester,nephomaniac/eutester,shaon/eutester,nephomaniac/nephoria,nephomaniac/eutester,shaon/eutester,nagyistoce/eutester,tbeckham/eutester,shaon/eutester,tbeckham/eutester