I changed that to make `confusion_matrix_with_labels` mean the same in `ALL_METRICS` and `NOT_SYMMETRIC_METRICS`. This way `test_format_invariance_with_1d_vectors` and `test_sample_order_invariance` check confusion_matrix with labels!=None. 

Just 'partial' looks pointless IMHO. Deleting this key will make first assertion in test_symmetry test fail. So there were 3 options:

1) leave "partial" as is, just rename the key;
2) delete assertion in `test_symmetry` or refactor how are tests organized;
3) run some tests for confusion matrix with labels != None 

I've chosen to do (3).