message: Don't emit SET instruction for primary key when creating object
  This filter had been removed by a mistake.
  This should make the ObjectStore app unit tests pass.
diff: @@ -42,7 +42,9 @@ Obj TableClusterTree::insert(ObjKey k, const FieldValues& values)
  // Replicate setting of values
  if (Replication* repl = m_owner->get_repl()) {
  + auto pk_col = m_owner->get_primary_key_column();
  for (const auto& v : values) {
  + if (v.col_key != pk_col)
  repl->set(m_owner, v.col_key, k, v.value, _impl::instr_Set);
  }
  }
  