Jim Ferenczi 60308cf0b3 Fix upgrade of custom similarity (#50851)
This change fixes the upgrade of index metadata that contain
a custom similarity with options that are not compatible with BM25.
The upgrade doesn't need a real similarity service so we fake one that
resolves all custom similarity to BM25 but this logic fails because the
BM25 provider checks that all options are compatible. This commit removes
the verification step as it is not needed during the upgrade (the verification
is done when the index is restored/opened).

Closes #50763
2020-01-10 18:43:13 +01:00
..