message: Fix variable name
  Test Plan: Builds
  Reviewers: georgep
diff: @@ -285,7 +285,7 @@ HloPrintOptions GetPrintOptions() {
  }
  std::pair<poplar::program::Program, poplar::DataStream> InitializeSeed(
  - poplar::Graph& master_graph, poplar::Graph& graph, int replica_count,
  + poplar::Graph& master_graph, poplar::Graph& graph, int replication_factor,
  poplar::program::Program& prog) {
  const std::string seed_prefix = "__seed";
  @@ -295,10 +295,10 @@ std::pair<poplar::program::Program, poplar::DataStream> InitializeSeed(
  auto data_stream = master_graph.addHostToDeviceFIFO(
  seed_prefix + "/stream", seed.elementType(),
  - seed.numElements() * std::max(replica_count, 1));
  + seed.numElements() * std::max(replication_factor, 1));
  poplar::program::Sequence seq;
  - if (replica_count > 1) {
  + if (replication_factor > 1) {
  seq.add(poplar::program::Copy(data_stream,
  master_graph.getNonReplicatedTensor(seed)));
  } else {
  @@ -312,16 +312,16 @@ std::pair<poplar::program::Program, poplar::DataStream> InitializeSeed(
  return {seq, data_stream};
  }
  -void ConnectSeedCallback(poplar::Engine& engine, int replica_count,
  +void ConnectSeedCallback(poplar::Engine& engine, int replication_factor,
  poplar::DataStream stream) {
  std::random_device rd;
  std::mt19937 gen(rd());
  - auto callback = [gen, replica_count](void* ptr) mutable {
  + auto callback = [gen, replication_factor](void* ptr) mutable {
  std::uniform_int_distribution<uint64_t> dis;
  uint64_t* seedValue = reinterpret_cast<uint64_t*>(ptr);
  - for (int i = 0; i < replica_count; ++i) {
  + for (int i = 0; i < replication_factor; ++i) {
  seedValue[i] = dis(gen);
  }
  };
  @@ -560,7 +560,7 @@ StatusOr<std::unique_ptr<Executable>> PoplarCompiler::RunBackend(
  }
  auto seed_setup = InitializeSeed(resources.main_graph, *sharding_main_graph,
  - replication_count, visitor.sequence);
  + replication_factor, visitor.sequence);
  // =======================================================================
  // DO NOT CHANGE THE ORDER OF THESE WITHOUT UPDATING PoplarProgramType IN
  @@ -604,7 +604,7 @@ StatusOr<std::unique_ptr<Executable>> PoplarCompiler::RunBackend(
  engine.reset(new poplar::Engine(resources.main_graph, progs, opts,
  progress_logging));
  - ConnectSeedCallback(*engine, replication_count, seed_setup.second);
  + ConnectSeedCallback(*engine, replication_factor, seed_setup.second);
  } catch (const std::exception& e) {
  return PoplarExceptionToTensorflowStatus("[Compile engine] ", e);
  }
  