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>

ipapython/install/common.py

@@ -35,12 +35,12 @@ class Installable(core.Configurable):
 
     def _get_components(self):
         components = super(Installable, self)._get_components()
-        if self.uninstalling:
+        if self.uninstalling:  # pylint: disable=using-constant-test
             components = reversed(list(components))
         return components
 
     def _configure(self):
-        if self.uninstalling:
+        if self.uninstalling:  # pylint: disable=using-constant-test
             return self._uninstall()
         else:
             return self._install()