Support to set/get parameter of groups in the CPM

There is currently no way to get/set a parameter in a specific group when using CPE.
CasProcessorConfigurationParameterSettings doesn't have any methods that support groups.
So if an analysis engine for example has the same parameter in two different groups, it is not possible two choose one to manipulate when using the CPE.
CasProcessorConfigurationParameterSettings should support the same things that ConfigurationParameterSettings does.