Broken transition rules for OS:Coil:Heating:Gas:MultiStage

[jmarrec]

Issue overview

Reg test multi_stage.osm is failing because this ends up blank: https://github.com/NREL/OpenStudio-resources/blob/7ee4b1be25a7794651e28be6836119d7d69a166e/model/simulationtests/multi_stage.osm#L1667

This is only a problem on develop, not in any release.

[jmarrec]

https://github.com/NREL/OpenStudio/pull/4666/files#diff-6cef0026841f3838a343f32c9b76a5c7fb15a31a0630fa57a5a0c5d116d6c015R7329

The fields aren't copied from old object to new object.