Extended test_confusion_matrix_binary to incorporate non-integer labels
Extended test_confusion_matrix_multiclass to incorporate non-integer labels
BUG: Fix for non-integer datatypes in confusion_matrix
STY: one-lined lines that where less than 79
MAINT: let the result type be infered by coo_matrix, possible since np.ones already integer typed
Merge pull request #1911 from Jim-Holmstroem/generalize_label_type_for_confusion_matrix

BUG: Generalize label type for `confusion_matrix`