bodhi: Change pagure_flatpak_namespace to flatpaks (staging)

This makes Bodhi look for a Flaptak in flatpaks/* in pagure when looking
up ACLs, rather than the (compatibility) default 'modules/

roles/bodhi2/base/templates/production.ini.j2

@@ -467,6 +467,13 @@ acl_system = pagure
 # pagure_url = https://src.fedoraproject.org/pagure/
 pagure_url = https://src{{env_suffix}}.fedoraproject.org/
 
+# This is the namespace where we expect to find the git sources for a Flatpak.
+# The default - 'modules' instead of 'flatpaks' - is for backward compatibility
+# pagure_flatpak_namespace = modules
+{% if env == 'staging' %}
+pagure_flatpak_namespace = flatpaks
+{% endif %}
+
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