tests: explicitly enable user namespaces for TEST-13-NSPAWN-SMOKE
Cherry-picked from: 67f5c0c776ce9449ad21e9854665573a05141fd4
patch_name: 0054-tests-explicitly-enable-user-namespaces-for-TEST-13-.patch
present_in_specfile: true
location_in_specfile: 54
squash_commits: true