Combine two add sweeping functions into one

[ZDu-IDM]

idmtools SimulationBuilder support two methods:

• add_sweep_definition(function, ...)
• add_multiple_parameter_sweep_definition(function, ...)

The first method only supports one parameter sweeping. The second method support multiple parameters (>=2) sweeping.

Currently have to remember both two methods and choose the right one based on the need. This causes certain inconveniences to the users.

Investigation: it is better to combine the two methods into one.

[shchen-idmod]

Fixed in 1.7.10 release