message: rebase and fix test by making xla not the default for Remapper class
diff: @@ -27,7 +27,7 @@ namespace grappler {
  class Remapper : public GraphOptimizer {
  public:
  explicit Remapper(RewriterConfig::Toggle opt_level,
  - bool xla_auto_clustering_on) :
  + bool xla_auto_clustering_on = false) :
  opt_level_(opt_level), xla_auto_clustering_on_(xla_auto_clustering_on) {}
  ~Remapper() override {}
  