Double wrapped key manager

[asfimport]

To minimize interaction with KMS, this manager will wrap the encryption keys twice.  Might be combined with key rotation for further optimization.

Reporter: Gidon Gershinsky / @ggershinsky
Assignee: Gidon Gershinsky / @ggershinsky

_{Note: This issue was originally created as PARQUET-1612. Please see the migration documentation for further details.}

[asfimport]

Gidon Gershinsky / @ggershinsky:
handled by pr 615