Update Oslo config sample generator

This commit syncs the latest version of the config generator and all
it's dependency modules from oslo-incubator. The justification was
change Iee6cc05cad70963f2a151f595ac376c9338f5774 which adds the oslo
synced version of the check_uptodate script. Which among other things
does proper cleanup of the tempdirs

Change-Id: I56bdd239b328cc38a83f80d14e53cc62d4f97954
6 files changed