Restore original intend of roundabout test

When doing the new Lua version refactor we changed the expectation to
use `continue uturn` instead of making a whole circle in the roundabout
as the original test case. This was only the shortest path since there
was no roundabout penalty.

include/extractor/guidance/turn_instruction.hpp

@@ -80,7 +80,7 @@ struct TurnInstruction
 
     bool IsUTurn() const
     {
-        return type == TurnType::Turn && direction_modifier == DirectionModifier::UTurn;
+        return type != TurnType::NoTurn && direction_modifier == DirectionModifier::UTurn;
     }
 
     static TurnInstruction INVALID() { return {TurnType::Invalid, DirectionModifier::UTurn}; }