The MLP outputs probabilities for 6 categories:
(whi, bla, his, asi, aian, oth) -- see EBISG_RACE_COLS in the
Python helper. wru uses 5 categories: (whi, bla, his, asi, oth).
This function sums aian and oth into oth.
map_6class_to_5class(probs_6)A matrix with 5 columns named c_whi, c_bla, c_his, c_asi, c_oth.
A matrix with 6 columns named whi, bla, his, asi, aian, oth.