The replica install was unilaterally removing KRB5CCNAME from
os.environ in some cases. Instead check first to see if it is
present and only remove in that case.
Fixes: https://pagure.io/freeipa/issue/9446
Signed-off-by: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>