Converts BuildResScheduleFile methods to ruby constants

[shorowit]

Pull Request Description

Addresses #1759.

Checklist

Not all may apply:

• 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

[joseph-robertson]

This is basically an extension of #1808?

I think my only concern is that perhaps these constants actually should have some documentation. Maybe we accept this PR as-is, but open a new issue requesting documentation and filling in TODOs for:

• BuildResidentialScheduleFile/resources/constants.rb
• BuildResidentialScheduleFile/resources/README.md (More ruby documentation #1784 (comment))
• BuildResidentialScheduleFile/resources/schedules.csv (More ruby documentation #1784 (comment))

[shorowit]

This is basically an extension of #1808?

Yes, I missed that there were more constants in this measure.

I think my only concern is that perhaps these constants actually should have some documentation. Maybe we accept this PR as-is, but open a new issue requesting documentation and filling in TODOs for:

Agreed that more comments would be useful. Some of the constants may be described in the measure where they get used. Someone who is familiar with the measure definitely needs to take a big cut on it. For now, I added your comment to #1759 so we don't lose track of them.