[releng] Revert "convert-to-tarballs: fix error when printing versions"

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 99373b246581692faf4f8751a1f2bb549328d203
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Tue Feb 18 09:10:56 2020 -0600

    Revert "convert-to-tarballs: fix error when printing versions"
    
    This reverts commit a90d7477bdae4d7ead09cdb7097a2047caa56aeb.

 tools/smoketesting/convert-to-tarballs.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/tools/smoketesting/convert-to-tarballs.py b/tools/smoketesting/convert-to-tarballs.py
index d7c03cf..ee319d1 100755
--- a/tools/smoketesting/convert-to-tarballs.py
+++ b/tools/smoketesting/convert-to-tarballs.py
@@ -740,7 +740,7 @@ class ConvertToTarballs:
         for idx in range(len(self.options.release_sets)):
             release_set = self.options.release_sets[idx]
             if release_set != 'Other':
-                versions.write('## %s\n' % release_set.upper())
+                versions.write('## %s\n' % string.upper(release_set))
                 modules_sorted = self.options.release_set[idx]
                 modules_sorted.sort()
                 subdirs = {}