Allow the sequence parameter to be used with default value if none specified

[mateusz_owczarek]

See thread https://forums.ni.com/t5/NI-TestStand/Automatically-quot-Default-Value-quot-of-a-Parameter-in-a/m-p/... for description of that case.

The solution could be to add a new flag: "UseDefaultValueByDefault" 

[Flaw]

Bump, I'm making sequence wrappers for LabView libraries and having no defaults is a pain with multiple enumerations