protected boolean initializeStoragePerTest() {
    return false;
  }
Sets the test to initialise the {@link StorageComponent} before each test rather than the test
class. Generally, tests will run faster if the storage is initialized as infrequently as
possibly while clearing data between runs, but for certain backends like Cassandra, it's
difficult to reliably clear data between runs and tends to be very slow anyways.
zipkin-tests/src/main/java/zipkin2/storage/ITStorage.java