AutoYaST conversion of registration fingerprint

[ancorgs]

Problem

We recently implemented support for specifying a certificate to be used during registration. See #2270.

Conversion of the fingerprints in an AutoYaST profile to the new Agama configuration format is still missing.

Solution

Implement the conversion of AutoYaST reg_server_cert_fingerprint and reg_server_cert_fingerprint_type to the Agama format:

{
  "security": {
    "sslCertificates": [
      { "fingerprint": "01:12:34:45:56:67:78:89:90", "algorithm": "SHA1" }
    ]
  }
}

Testing

Added new unit tests