[SSSD] [sssd PR#863][opened] ci: add Debian 10

[pbrezina]

   URL: https://github.com/SSSD/sssd/pull/863
Author: pbrezina
 Title: #863: ci: add Debian 10
Action: opened

PR body:
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To pull the PR as Git branch:
git remote add ghsssd https://github.com/SSSD/sssd
git fetch ghsssd pull/863/head:pr863
git checkout pr863