Problem was that key rotation from encrypted to unecrypted was skipped
when encryption is disabled (i.e. set global innodb-encrypt-tables=OFF).
fil_crypt_needs_rotation
If encryption is disabled (i.e. innodb-encrypt-tables=off)
and there is tablespaces using default encryption (e.g.
system tablespace) that are still encrypted state we need
to rotate them from encrypted state to unencrypted state.
