fix make test without libcurl
fix make test without libcurl

toolmmy/libjson-rpc-cpp,cinemast/libjson-rpc-cpp,jmassey-jacques/libjson-rpc-cpp,jmassey-jacques/libjson-rpc-cpp,toolmmy/libjson-rpc-cpp,toolmmy/libjson-rpc-cpp,jmassey-jacques/libjson-rpc-cpp,cinemast/libjson-rpc-cpp,jmassey-jacques/libjson-rpc-cpp,cinemast/libjson-rpc-cpp,cinemast/libjson-rpc-cpp,toolmmy/libjson-rpc-cpp,cinemast/libjson-rpc-cpp