message: use find instead of get to query account object
diff: @@ -288,11 +288,8 @@ read_only::get_info_results read_only::get_info(const read_only::get_info_params
  abi_def get_abi( const chain_controller& db, const name& account ) {
  const auto &d = db.get_database();
  - const account_object *code_accnt = nullptr;
  - try {
  - code_accnt = &d.get<account_object, by_name>(account);
  - FC_ASSERT(code_accnt != nullptr);
  - } EOS_CAPTURE_AND_RETHROW( chain::account_query_exception, "Fail to retrive account for ${account}", ("account", account) )
  + const account_object *code_accnt = d.find<account_object, by_name>(account);
  + EOS_ASSERT(code_accnt != nullptr, chain::account_query_exception, "Fail to retrieve account for ${account}", ("account", account) );
  abi_def abi;
  abi_serializer::to_abi(code_accnt->abi, abi);
  return abi;
  