Fix problem with "Attempt to redefine entity" when using type aliases as class parameter

If a function parameter declaration or return type, references a type that has not yet been loaded, and that type is prefixed with the name of a module that has not yet been loaded, then the loaders will first make an attempt to load the files in the modules manifests directory. If such a file, in turn, also references the same type, then that triggers a recursive load. When the recursive call returns, the loader will still try to add the type, which results in an "Attempt to redefine entity" error.