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

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• 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)