Add an ENV Variable to force space load instances translation or not

[jmarrec]

Pull request overview

cf NatLabRockies/OpenStudio#5651

This Pull Request is concerning:

• Case 4 - Other: Something else, like maintenance of the repo, or just committing test results with a new OpenStudio version.

Depending on your answer, please fill out the required section below, and delete the three others.
Leave the review checklist in place.

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Case 4: Other

You can now use USE_SPACE_LOAD_INSTANCES=false to turn off FT Translation to SpaceLoad Instances, eg it won't translate to ElectricEquipment:Instance + ElectricEquipment:Definition but to ElectricEquipment

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Review Checklist

• Code style (indentation, variable names, strip trailing spaces)
• Functional code review (it has to work!)
• Matching OSM test has been added or # TODO added to model_tests.rb
• Appropriate out.osw have been committed
• Test is stable
• Object is tested in autosize_hvac as appropriate
• The appropriate labels have been added to this PR:
  • One of: NewTest, TestFix, NewTestForExisting, Other
  • If NewTest: add PendingOSM or AddedOSM