message: fix postgres_executor_test
diff: @@ -423,7 +423,8 @@ namespace iroha {
  TEST_F(AddPeer, NoPerms) {
  auto cmd_result = execute(*mock_command_factory->constructAddPeer(*peer));
  - std::vector<std::string> query_args{peer->toString()};
  + std::vector<std::string> query_args{peer->address(),
  + peer->pubkey().hex()};
  CHECK_ERROR_CODE_AND_MESSAGE(cmd_result, 2, query_args);
  }
  