message: Fix test lock order acquisition to avoid a TSAN message
  Summary: Fix test lock order acquisition to avoid a TSAN message
diff: @@ -192,10 +192,13 @@ TEST(LockableStat, Swap) {
  statA.swap(statB);
  - auto guard = statA.lock();
  - EXPECT_EQ(guard->sum(0), 0);
  - guard = statB.lock();
  + // the stats are reversed now
  + // so acquire the locks in the B/A order
  + // to avoid a TSAN lock-order-inversion message
  + auto guard = statB.lock();
  EXPECT_EQ(guard->sum(0), 10);
  + guard = statA.lock();
  + EXPECT_EQ(guard->sum(0), 0);
  }
  TEST(LockableStat, AddValue) {
  