test - normalize path for MultiFilePathOptions

As part of work for

   issue2551334 - get test suite running under windows

use os.path.normpath on absolute path processing to provide similar
processing to os.path.join on the relative codepath.

Author: rouilj

roundup/configuration.py

@@ -590,7 +590,7 @@ def get(self):
             if elem and not os.path.isabs(elem):
                 pathlist.append(os.path.join(self.config["HOME"], elem))
             else:
-                pathlist.append(elem)
+                pathlist.append(os.path.normpath(elem))
         if pathlist:
             return pathlist
         else: