ipatests: Log debug messages for locator plugin
    
    SSSD provides Kerberos plugin
    > to tell the Kerberos libraries what Realm and which KDC to use.
    
    It's useful to see what is happening during kinit in case of any
    issues.
    
    Related: https://pagure.io/freeipa/issue/8353
    Signed-off-by: Stanislav Levin <slev@altlinux.org>
    Reviewed-By: Francois Cami <fcami@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>