LPS-44360 Add ratings test util
LPS-44360 Implement base testing logic for ratings export/import
LPS-44360 Do not add ratings when testing manifest summary
LPS-44360 Source format
LPS-44360 The test is working now because we have only one ratings entry in the collection, but would not if we would have more than one
LPS-44360 Unrelated source format
LPS-44360 Good enough for now? unless we have more than one iterator
LPS-44360 Good enough for now? unless we have more than one iterator