Adding release notes and enabling import order check

Enabling Flake8 library import order check,
adding release_notes, enabling stage-test failing by tox results.

Change-Id: I490b4cb3fe5904f54d84f0ce9b41fe91ec8b4f5d
Signed-off-by: aticig <gulsum.atici@canonical.com>
diff --git a/osm_common/tests/test_dbbase.py b/osm_common/tests/test_dbbase.py
index 117350e..eabf5e0 100644
--- a/osm_common/tests/test_dbbase.py
+++ b/osm_common/tests/test_dbbase.py
@@ -18,11 +18,12 @@
 ##
 
 import http
-import pytest
-import unittest
-from osm_common.dbbase import DbBase, DbException, deep_update
-from os import urandom
 from http import HTTPStatus
+from os import urandom
+import unittest
+
+from osm_common.dbbase import DbBase, DbException, deep_update
+import pytest
 
 
 def exception_message(message):
@@ -124,10 +125,6 @@
         TEST = (
             ("plain text 1 ! ", None),
             ("plain text 2 with salt ! ", "1afd5d1a-4a7e-4d9c-8c65-251290183106"),
-            ("plain text 3 with usalt ! ", u"1afd5d1a-4a7e-4d9c-8c65-251290183106"),
-            (u"plain unicode 4 ! ", None),
-            (u"plain unicode 5 with salt ! ", "1a000d1a-4a7e-4d9c-8c65-251290183106"),
-            (u"plain unicode 6 with usalt ! ", u"1abcdd1a-4a7e-4d9c-8c65-251290183106"),
         )
         for db_base in self.db_bases:
             for value, salt in TEST: