Allow for timepicker configuration to be honored when used with datepicker

[cca-developer]

From what I can tell, right now when the timepicker is included with a datepicker via withTimepicker, all the default timepicker configurations are used. I would like to be able to use 24 hour time instead of AM/PM. The timepicker configuration allows for that, but I can't figure out how to have the datepicker accept timepicker configuration.