fix: fill read ssh host key pub keys

[glimchb]

Fixes #404

Signed-off-by: Boris Glimcher [email protected]

[glimchb]

example:

{
   "ietf-sztp-bootstrap-server:input":{
      "progress-type":"bootstrap-complete",
      "message":"message sent via JSON",
      "ssh-host-keys":{
         "ssh-host-key":[
            {
               "algorithm":"ecdsa-sha2-nistp256",
               "key-data":"AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBMxLCqec8/8FTSSszKoUTjbkiR1Yf62dPSQt5M/jQOxMrJvipbMr69awVU5fMeiGlDEMx4WghyN+BFZU+EQUJdk="
            },
            {
               "algorithm":"ssh-ed25519",
               "key-data":"AAAAC3NzaC1lZDI1NTE5AAAAIKY2TIKz6F3muvc1qH1lU9VUFBccdrZOvNt0gS7SSSt9"
            },
            {
               "algorithm":"ssh-rsa",
               "key-data":"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"
            }
         ]
      },
      "trust-anchor-certs":{
         "trust-anchor-cert":[
            "bXlzc2hwYXNz"
         ]
      }
   }
}