Intermittent failure of CassandraAdapterIT#testMaterializedView

This seems to happen around half the time I run the test. If anyone has any ideas what might be going wrong, I'd appreciate some help. As a quick summary of what the test is doing, Cassandra allows users to define materialized views in the schema and these should be exposed to Calcite by the adapter to enable view-based query writing.

This is implemented using Hook.TRIMMED when the schema is created to add instances of MaterializedViewTable to the schema.