TST: add tests for server#217 and server#221
Summary
Tests for caosdb-server#217 (closed) and caosdb-server#221 (closed).
Relevant MR: caosdb-server!56 (merged)
Tests for caosdb-server#217 (closed) and caosdb-server#221 (closed).
Relevant MR: caosdb-server!56 (merged)