Resolve discrepancy between DEER warehouse input vs. modeled HVAC system type

[eringold]

The changes in #118 included changing DEER warehouse thermostat schedules to be heating-only, as well as added secondary system types for HVAC systems serving warehouses, applied to heating-only spaces. These changes had the effect of setting HVAC for all DEER warehouse floor area to the secondary systems, but the building systems in the HVAC distributions (and thus the output system_type fields) remain the primary types. This impacts output processing.

Potential resolutions include:

1. Re-implement the changes in the HVAC distributions to reflect the heating-only systems as 'primary' systems
2. Refactor California warehouses to have a diversity in space types, the same as DOE warehouses. This would enable those buildings to still have fully-conditioned spaces with primary system types.