ipatests: add test for ticket 9610
    
    Test scenario:
    - ensure there is no /etc/ssh/ssh_config.orig file
    - force ipa-client package reinstallation
    - ensure no backup file is created in /etc/ssh/ssh_config.orig
    
    Related: https://pagure.io/freeipa/issue/9610
    Signed-off-by: Florence Blanc-Renaud <flo@redhat.com>
    Reviewed-By: Michal Polovka <mpolovka@redhat.com>