Issue 50873 - Fix issues with healthcheck tool
Description:
- Wrong error code reported with result for backend check
- Disk Space Monitor check crashes because it is missing "import copy"
- On a non-LDAPI instance "dsctl healthcheck" does not prompt for bind dn, only for password.
relates: https://pagure.io/389-ds-base/issue/50873
Reviewed by: firstyear(Thanks!)