Remove execution-time which can vary from machine to machine.
@luke , As we discussed. Merging dierctly. Tests passing in https://nexedi.erp5.net/test_result_module/20200117-9F5C0733 /reviewed-on !181
@luke , As we discussed. Merging dierctly. Tests passing in https://nexedi.erp5.net/test_result_module/20200117-9F5C0733 /reviewed-on !181