attr_map potentially needs to be updated

[bayc]

HOPP/hopp/simulation/hybrid_simulation.py

Line 1188 in 0b3aee3

'om_expenses': {'name': 'O&M Expenses ($/year)'}, # list

I believe at the line above that the attribute om_expenses doesn't exist any more but has been updated to om_total_expenses. Need to confirm this, and if confirmed, need to update the attr_map.