add option to skip LCIA shortcut calculations

[rjhanes]

add option to skip LCIA shortcut calculations

[rjhanes]

The flags section in config reads as follows with the new parameter, called use_lcia_shortcut

flags:
  compute_locations     : True  # if compute_locations is enabled (True), compute locations from raw input files (e.g., LMOP, US Wind Turbine Database)
  generate_step_costs   : True # set to False if supply chain costs for a facility type vary regionally
  run_routes            : True  # if run_routes is enabled (True), compute routing distances between all input locations
  use_computed_routes   : True  # if use_computed_routes is enabled, read in a pre-assembled routes file instead of generating a new one
  initialize_costgraph  : True  # create cost graph fresh or use an imported version
  enable_data_filtering : False  # If true, dataset will be filtered to the states below
  pickle_costgraph      : True  # save the newly initialized costgraph as a pickle file
  use_fixed_lifetime    : True # set to False to use Weibull distribution for lifetimes
  use_lcia_shortcut     : True # set to False to re-generate the lca_db file

[tjlca]

Completed via PR #101