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/base58_tests.cpp

@@ -13,6 +13,7 @@
 #include "uint256.h"
 #include "util.h"
 #include "utilstrencodings.h"
+#include "test/test_bitcoin.h"
 
 #include <boost/foreach.hpp>
 #include <boost/test/unit_test.hpp>
@@ -23,7 +24,7 @@
 using namespace json_spirit;
 extern Array read_json(const std::string& jsondata);
 
-BOOST_AUTO_TEST_SUITE(base58_tests)
+BOOST_FIXTURE_TEST_SUITE(base58_tests, BasicTestingSetup)
 
 // Goal: test low-level base58 encoding functionality
 BOOST_AUTO_TEST_CASE(base58_EncodeBase58)