[Analytics] Migrate remaining integration tests to the single dtest cluster per class model

In https://issues.apache.org/jira/browse/CASSANDRA-19251, the majority of the tests were moved to the single in-jvm dtest cluster per class. There are a few remaining tests that are still using the CassandraIntegrationTest annotation. However, we'd like to consolidate in a single approach for testing for the following reasons:

1. Consolidate testing code in a single place to reduce maintenance burden whenever we are touching the testing framework code
2. Have a unique and consistent developer experience for integration tests

As part of this effort, we can remove the unused code left from the refactor.