public void setLocatorCount(int lc) {
    if (_stats == null) {
      known_locators.set(lc);
    } else {
      _stats.setInt(_KNOWN_LOCATORS, lc);
    }
  }
Called when the DS comes online so we can hookup the stats
geode-core/src/main/java/org/apache/geode/distributed/internal/LocatorStats.java