public void setLocators(final Locator<ID> locator,
      final MembershipLocator<ID> membershipLocator) {
    this.locator = locator;
    this.membershipLocator = membershipLocator;
  }
Start services - this will start everything up and join the cluster.
Invoke init() before this method.
geode-membership/src/main/java/org/apache/geode/distributed/internal/membership/gms/Services.java