Fixing attributes to allow &default in tables/sets to be associated

with the field.

This works now:

    type X: record {
        a: table[string] of bool &default=table( ["foo"] = T );
        b: table[string] of bool &default=table();
        c: set[string] &default=set("A", "B", "C");
        d: set[string] &default=set();
    };

I think previously the intend was to associate &default with the
table/set (i.e., define the default value for non-existing indices).
However, that was already not working: the error checking was
reporting type mismatches. So, this shouldn't break anything and make
things more consistent.

src/StateAccess.cc

@@ -935,7 +935,7 @@ void NotifierRegistry::Register(ID* id, NotifierRegistry::Notifier* notifier)
 		attr_list* a = new attr_list;
 		Attr* attr = new Attr(ATTR_TRACKED);
 		a->append(attr);
-		id->SetAttrs(new Attributes(a, id->Type()));
+		id->SetAttrs(new Attributes(a, id->Type(), false));
 		Unref(attr);
 		}