Split the giant test binaries into smaller unit tests

This is an intermediate step to have smaller unit tests. It is a trade off
between having many many test executables compared to a few bigger ones. But
this comes a lot closer to what QtTest is meant to be used.

tests/blackcore/testconnectivity/testconnectivity.h

@@ -0,0 +1,26 @@
+/* Copyright (C) 2017
+ * swift project community / contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+#ifndef BLACKCORETEST_TESTCONNECTIVITY_H
+#define BLACKCORETEST_TESTCONNECTIVITY_H
+
+//! \cond PRIVATE_TESTS
+//! \file
+//! \ingroup testblackcore
+
+
+
+namespace BlackCoreTest
+{
+
+} //namespace
+
+//! \endcond
+
+#endif // guard