Add a mechanism for using a mock config dir for QA tests

qa/tests/common/test_module.cpp

@@ -31,8 +31,10 @@
 #include <wx/init.h>
 
 #include <locale_io.h>
+
 bool init_unit_test()
 {
+    KI_TEST::SetMockConfigDir();
     SetPgm( new MOCK_PGM_BASE() );
 
     // Ensure the "C" locale is used in tests
@@ -57,4 +59,4 @@ int main( int argc, char* argv[] )
     wxUninitialize();
 
     return ret;
-}
+}