getFullFunctionName: Avoid returning ProcGlobal
getFullFunctionName: Avoid returning ProcGlobal

When run from an independent module we can use something like
IMName#Func to call functions using FuncRef. Therefore we now don't
return any IM/ProcGlobal specification only module specification.

t-b/igor-unit-testing-framework,t-b/igor-unit-testing-framework