Make sure that CO2 and GenContam are handled by all components

[mjwitte]

Issue overview

1. While reviewing another PR, noticed that GenContam isn't getting passed through by variable speed coils, only CO2 is.
   

   EnergyPlus/src/EnergyPlus/VariableSpeedCoils.cc

   Lines 8358 to 8360 in 378844d

   	if (state.dataContaminantBalance->Contaminant.CO2Simulation) {
   	state.dataLoopNodes->Node(AirOutletNode).CO2 = state.dataLoopNodes->Node(AirInletNode).CO2;
   	}

2. While working on Error with Zone Air Contaminant Balance #10348 noticed this for SpaceHVAC:ZoneEqupimentMixer.
   

   EnergyPlus/src/EnergyPlus/DataZoneEquipment.cc

   Lines 1839 to 1850 in 378844d

   	for (auto &mixerSpace : this->spaces) {
   	auto &spaceOutletNode = state.dataLoopNodes->Node(mixerSpace.spaceNodeNum);
   	sumEnthalpy += spaceOutletNode.Enthalpy * mixerSpace.fraction;
   	sumHumRat += spaceOutletNode.HumRat * mixerSpace.fraction;
   	sumCO2 += spaceOutletNode.CO2 * mixerSpace.fraction;
   	sumPressure += spaceOutletNode.Press * mixerSpace.fraction;
   	sumFractions += mixerSpace.fraction;
   	}
   	equipInletNode.Enthalpy = sumEnthalpy / sumFractions;
   	equipInletNode.HumRat = sumHumRat / sumFractions;
   	equipInletNode.CO2 = sumCO2 / sumFractions;
   	equipInletNode.Press = sumPressure / sumFractions;

3. Need to check the entire code base to make sure that CO2 and GenContam are being calculated and/or passed through as needed.

Details

Some additional details for this issue (if relevant):

• Platform (Operating system, version)
• Version of EnergyPlus (if using an intermediate build, include SHA)
• Unmethours link or helpdesk ticket number

Checklist

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• Defect file added (list location of defect file here)
• Ticket added to Pivotal for defect (development team task)
• Pull request created (the pull request will have additional tasks related to reviewing changes that fix this defect)

[RKStrand]

@mjwitte I don't know if you planned to grab this one or not, but I have started looking at this and trying to track down any other places where this is an issue. If you were planning on working on this, let me know soon so that I can stand down and not invest more in this. Thanks!

[mjwitte]

@RKStrand Go for it.