Christopher Vittal

And now, the fixes begin

This is green now. Testing it fully is difficult since we don't have lowered import. However, manually testing both lowered and unlowered versions has produced bit-for-bit identical output, and [test_bgen_export_from_vcf](https://github.com/chrisvittal/hail/blob/e0de6b3f5c91820be94591e95d1a49b67c83cd7f/hail/python/test/hail/methods/test_impex.py#L1521-L1536)...

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