Materialization tests fail

[adzialocha]

failures:

---- materializer::service::tests::materialize_document_from_bus stdout ----
-------------- TEST START --------------
thread 'materializer::service::tests::materialize_document_from_bus' panicked at 'We expect that the document is `Some`', aquadoggo/src/materializer/service.rs:234:18

---- materializer::service::tests::materialize_update_document stdout ----
-------------- TEST START --------------
thread 'materializer::service::tests::materialize_update_document' panicked at 'assertion failed: `(left == right)`
  left: `String("panda")`,
 right: `String("panda123")`', aquadoggo/src/materializer/service.rs:409:13


failures:
    materializer::service::tests::materialize_document_from_bus
    materializer::service::tests::materialize_update_document

[adzialocha]

This fails reliably in our CI since we merged #285. On my computer I couldn't reproduce it yet.

[adzialocha]

Increasing the timeout helps for now: 4b5d7c4 later we want some more elegant way to wait for the test to finish: #271