Merge remote-tracking branch 'remotes/berrange/tags/qcrypto-next-pull-request' into...

Merge remote-tracking branch 'remotes/berrange/tags/qcrypto-next-pull-request' into staging

Misc crypto subsystem fixes

* Improve error message for large files when creating LUKS volumes
* Expand crypto hash benchmark coverage
* Misc code refactoring with no functional change

# gpg: Signature made Mon 15 Jun 2020 11:35:17 BST
# gpg:                using RSA key DAF3A6FDB26B62912D0E8E3FBE86EBB415104FDF
# gpg: Good signature from "Daniel P. Berrange <[email protected]>" [full]
# gpg:                 aka "Daniel P. Berrange <[email protected]>" [full]
# Primary key fingerprint: DAF3 A6FD B26B 6291 2D0E  8E3F BE86 EBB4 1510 4FDF

* remotes/berrange/tags/qcrypto-next-pull-request:
  crypto: Remove use of GCRYPT_VERSION macro.
  test-crypto-secret: add 'secret_keyring' object tests.
  crypto/linux_keyring: add 'secret_keyring' secret object.
  crypto/secret: move main logic from 'secret' to 'secret_common'.
  crypto: add "none" random provider

Signed-off-by: Peter Maydell <[email protected]>