Add isort and flake8 to CI (#869)

* Run isort.

* Clean up unused assignments.

* Add flake8 linting step.

plugins/module_utils/time.py

@@ -5,6 +5,8 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from __future__ import absolute_import, division, print_function
+
+
 __metaclass__ = type
 
 
@@ -13,7 +15,6 @@ import re
 import sys
 
 from ansible.module_utils.common.text.converters import to_native
-
 from ansible_collections.community.crypto.plugins.module_utils.crypto.basic import (
     OpenSSLObjectError,
 )