test_bigquery_tornadoes_it fails due to a hash mismatch

For example, 

https://builds.apache.org/job/beam_PostCommit_Python_Verify/6626/console

 
09:32:19 Expected: (Test pipeline expected terminated in state: DONE and Expected checksum is 83789a7c1bca7959dcf23d3bc37e9204e594330f)09:32:19 but: Expected checksum is 83789a7c1bca7959dcf23d3bc37e9204e594330f Actual checksum is d860e636050c559a16a791aff40d6ad809d4daf0

Root cause seems to be a hash function change in https://github.com/apache/beam/pull/7029