mlflow

0cf86866 - Fix a bug where spark.log_model doesn't save signature and input_example (#3151)

Fix a bug where spark.log_model doesn't save signature and input_example (#3151) * Add a test that fails Signed-off-by: harupy <17039389+harupy@users.noreply.github.com> * Add missing signature and input_example Signed-off-by: harupy <17039389+harupy@users.noreply.github.com>