pylint: fix inconsistent-return-statements
pylint 2.7.0 now emits inconsistent-return-statements if one of
try/except statement is not returning explicitly while the other do.
Fixes: https://pagure.io/freeipa/issue/8720
Signed-off-by: Florence Blanc-Renaud <flo@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>