Reflect API change of SSH store in Web UI

Format of ipasshpubkey in users and hosts changed from BYTES to STR. Web UI no longer gets the value as base64 encoded string in a object.

Label was changed to reflect that the key don't have to be plain base64 encoded blob.

https://fedorahosted.org/freeipa/ticket/2989

ipalib/plugins/internal.py

@@ -547,7 +547,7 @@ class i18n_messages(Command):
             },
             "sshkeystore": {
                 "keys": _("SSH public keys"),
-                "set_dialog_help": _("Base-64 encoded SSH public key:"),
+                "set_dialog_help": _("SSH public key:"),
                 "set_dialog_title": _("Set SSH key"),
                 "show_set_key": _("Show/Set key"),
                 "status_mod_ns": _("Modified: key not set"),