tests: Initialize networking on windows

src/test/test_bitcoin.cpp

@@ -36,6 +36,7 @@ BasicTestingSetup::BasicTestingSetup(const std::string& chainName)
 {
         ECC_Start();
         SetupEnvironment();
+        SetupNetworking();
         fPrintToDebugLog = false; // don't want to write to debug.log file
         fCheckBlockIndex = true;
         SelectParams(chainName);