Fix bug in ClientTest.cpp. The DelegatingListener was no initiailizing its m_listener reference on construction.
Fix bug in ClientTest.cpp. The DelegatingListener was no initiailizing its m_listener reference on construction.


creative-quant/voltdb-client-cpp,creative-quant/voltdb-client-cpp,creative-quant/voltdb-client-cpp,creative-quant/voltdb-client-cpp