Moved class virtual param test into ClassVirtualTest case

VirtualTest was not the correct spot.
Corrected virtual non-overridden protected trait method invocations

What a mouthful. And nightmare, having been away from the trait
implementation for so long.

This exemplifies the need for a general-purpose means of accessing the
protected API of the supertype to invoke any super-method that is desired;
this was on my list of TODOs and will likely be implemented for the upcoming
release (0.2.3), after which this implementation will be updated.