ReportUtilityBills: account for all production credit

[joseph-robertson]

Pull Request Description

An alternative to #1554.

We are using "PV" (e.g., "PV Credit", "PVCompensationType") where something more general like "Production" may be more appropriate. Is that OK, or should we make some changes/additions? Otherwise, because the battery/generator is behind the meter, we probably should either introduce a new "Other Credit" or sum against "Energy". The latter is probably preferred.

Therefore, the changes that need to happen are:

• Battery or generator w/ no PV: assume it's "net metering". In this case, all credit goes to "Energy".
• Battery or generator w/ PV: only allow "net metering" (according to PV compensation type). In this case, all credit goes to "PV Credit".

Checklist

PR Author: Check these when they're done. Not all may apply. strikethrough and check any that do not apply.

PR Reviewer: Verify each has been completed.

• Schematron validator (EPvalidator.xml) has been updated
• Sample files have been added/updated (openstudio tasks.rb update_hpxmls)
• Tests have been added/updated (e.g., HPXMLtoOpenStudio/tests/test*.rb 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 of sample files