TST: remove xfail after fix

Summary

caosdb-server#264 (closed) has been fixed with caosdb-server!78 (merged)

assigned to @timm

added 9 commits

• d6486cfc...000817dc - 8 commits from branch dev
• 7ad66ccb - Merge branch 'dev' into f-external-ids

Compare with previous version

mentioned in merge request caosdb-server!78 (merged)

requested review from @daniel

LGTM

approved this merge request

mentioned in commit 06330894

merged