Use singleton block tree database instance

src/test/test_bitcoin.cpp

@@ -12,10 +12,15 @@ extern bool fPrintToConsole;
 extern void noui_connect();
 
 struct TestingSetup {
+    CCoinsViewDB *pcoinsdbview;
+
     TestingSetup() {
         fPrintToDebugger = true; // don't want to write to debug.log file
         noui_connect();
         bitdb.MakeMock();
+        pblocktree = new CBlockTreeDB("cr+");
+        pcoinsdbview = new CCoinsViewDB();
+        pcoinsTip = new CCoinsViewCache(*pcoinsdbview);
         LoadBlockIndex(true);
         bool fFirstRun;
         pwalletMain = new CWallet("wallet.dat");
@@ -26,6 +31,9 @@ struct TestingSetup {
     {
         delete pwalletMain;
         pwalletMain = NULL;
+        delete pcoinsTip;
+        delete pcoinsdbview;
+        delete pblocktree;
         bitdb.Flush(true);
     }
 };