load_predict_data: Load and prepare data for prediction
In NSAPH/airpred: A Framework For Building Air Pollution Estimation Models

Load and prepare data for prediction

1	load_predict_data(init = T, shutdown = T)

`init`	should an h2o cluster be initialized during the imputation process (default = TRUE)
`shutdown`	should the h2o cluster used during imputation be shutdown after imputation (default = TRUE) Uses `predict_mid_process` and `predict_data` from the configuration file.