Description of problem:
'"\"\\x98\" from ASCII-8BIT to UTF-8"' error while trying to delete oval content.

Version-Release number of selected component (if applicable):
- Satellite 6.10.0 snap 8
- tfm-rubygem-smart_proxy_openscap-0.9.0-1.el7sat.noarch
- ansiblerole-foreman_scap_client-0.2.0-1.el7sat.noarch
- rubygem-foreman_scap_client-0.5.0-1.el8sat.noarch

How reproducible:
- Always

Steps to Reproduce:
1. Create a oval content
curl -H "Accept: text/multipart" -k -X POST -u admin:password https://$(hostname)/api/v2/compliance/oval_contents -F 'oval_content[name]=jboss' -F 'oval_content[scap_file]=@jboss-eap-7.oval.xml.bz2'  | json_reformat

2. Try to delete oval content.
curl -H "Accept: application/json" -X DELETE -u admin:password https://$(hostname)/api/v2/compliance/oval_contents/1 | json_reformat

Actual results:
[root@dhcp-2-17 ~]# curl -H "Accept: application/json" -X DELETE -u admin:password https://$(hostname)/api/v2/compliance/oval_contents/1 | json_reformat
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100    64    0    64    0     0    152      0 --:--:-- --:--:-- --:--:--   152
{
    "error": {
        "message": "\"\\x98\" from ASCII-8BIT to UTF-8"
    }
}


Expected results:
- No error while trying to delete oval content.

Additional info:

- Description of "GET /api/compliance/oval_policies/:id/oval_content" api endpoint is "Show a policy's SCAP content", it should be "OVAL content" instead of "SCAP content".