Update python-oslo.privsep to version 2.8.0 / rev 17 via SR 977079
    
    https://build.opensuse.org/request/show/977079
    by user dirkmueller + dimstar_suse
    - update to version 2.8.0
      - Fix formatting of release list
      - Add note explaining max_buffer_size value
      - Update master for stable/yoga
      - Remove unnecessary unicode prefixes
      - Bump max_buffer_size for Deserializer
      - Add Python3 yoga unit tests
      - Add Python3 zed unit tests
      - Remove six
      - Update master for stable/xena