Fix errors found by Pylint-2.4.3

New Pylint (2.4.3) catches several new 'true problems'. At the same
time, it warns about things that are massively and reasonably
employed in FreeIPA.

list of fixed:
- no-else-continue
- redeclared-assigned-name
- no-else-break
- unnecessary-comprehension
- using-constant-test (false positive)

list of ignored (responsibility of contributors and reviewers):
- import-outside-toplevel

Fixes: https://pagure.io/freeipa/issue/8102
Signed-off-by: Stanislav Levin <slev@altlinux.org>
Reviewed-By: Fraser Tweedale <ftweedal@redhat.com>

ipaserver/plugins/trust.py

@@ -363,8 +363,7 @@ def add_range(myapi, trustinstance, range_name, dom_sid, *keys, **options):
             if info_list:
                 info = info_list[0]
                 break
-            else:
-                sleep(2)
+            sleep(2)
 
         required_msSFU_attrs = ['msSFU30MaxUidNumber', 'msSFU30OrderNumber']