message: cleos: fix issue transactions error
  rename "data" to "transaction" based on "-j" output
  reuse get_transactions_func call result for output
diff: @@ -1107,7 +1107,7 @@ int main( int argc, char** argv ) {
  }
  auto result = call(get_transactions_func, arg);
  if( printjson ) {
  - std::cout << fc::json::to_pretty_string(call(get_transactions_func, arg)) << std::endl;
  + std::cout << fc::json::to_pretty_string(result) << std::endl;
  }
  else {
  const auto& trxs = result.get_object()["transactions"].get_array();
  @@ -1115,7 +1115,7 @@ int main( int argc, char** argv ) {
  const auto& tobj = t.get_object();
  const auto& trx = tobj["transaction"].get_object();
  - const auto& data = trx["data"].get_object();
  + const auto& data = trx["transaction"].get_object();
  const auto& msgs = data["actions"].get_array();
  for( const auto& msg : msgs ) {
  