Add mechanical ventilation warnings

[shorowit]

Pull Request Description

Adds some warnings related to mechanical ventilation systems with unmeasured airflow.

For example, if this is in the HPXML:

            <VentilationFan>
              <SystemIdentifier id='VentilationFan1'/>
              <FanType>energy recovery ventilator</FanType>
              <RatedFlowRate dataSource>75.8</RatedFlowRate>
              <HoursInOperation>24.0</HoursInOperation>
              <UsedForWholeBuildingVentilation>true</UsedForWholeBuildingVentilation>
              <IsSharedSystem>false</IsSharedSystem>
              <TotalRecoveryEfficiency>0.6</TotalRecoveryEfficiency>
              <SensibleRecoveryEfficiency>0.7</SensibleRecoveryEfficiency>
              <FanPower>66.1</FanPower>
              <extension>
                <FlowRateNotTested>true</FlowRateNotTested>
              </extension>
            </VentilationFan>

you will now get:

Warning: Both RatedFlowRate and extension/FlowRateNotTested="true" are provided; the ventilation system is assumed to have unmeasured airflow and RatedFlowRate will not be used.

Checklist

Not all may apply:

• OS-HPXML git subtree has been pulled
• 301validator.sch has been updated (reference EPvalidator.sch)
• Sample files have been added/updated (openstudio tasks.rb update_hpxmls)
• Tests have been added/updated (e.g., rulesets\tests and/or workflow/tests/*_test.rb)
• Documentation has been updated
• Changelog has been updated
• openstudio tasks.rb update_measures has been run
• No unexpected changes to simulation results on CI