MBS-4669 again: Amend refresh-release_meta-asin script to account for cases where the asin should be set to null as well.
Merge branch 'mbs-4669-redux' into beta

* mbs-4669-redux:
  MBS-4669 again: Amend refresh-release_meta-asin script to account for cases where the asin should be set to null as well.