tests: add a BasicTestingSetup and apply to all tests

Make sure that chainparams and logging is properly initialized. Doing
this for every test may be overkill, but this initialization is so
simple that that does not matter.

This should fix the travis issues.

src/test/test_bitcoin.cpp

@@ -26,11 +26,17 @@ CWallet* pwalletMain;
 extern bool fPrintToConsole;
 extern void noui_connect();
 
-TestingSetup::TestingSetup()
+BasicTestingSetup::BasicTestingSetup()
 {
         fPrintToDebugLog = false; // don't want to write to debug.log file
         SelectParams(CBaseChainParams::MAIN);
-        noui_connect();
+}
+BasicTestingSetup::~BasicTestingSetup()
+{
+}
+
+TestingSetup::TestingSetup()
+{
 #ifdef ENABLE_WALLET
         bitdb.MakeMock();
 #endif