Fix pylint3-detected errors after migration from python 3.7 to 3.9

Author: Aleksandr Kozhemyakin

helpers/sendbug.py

@@ -80,7 +80,7 @@ def createTask(server_base_url, user, password,
 
         server_base_url = 'https://jira.postgrespro.ru'
         complete_url = "%s/rest/api/2/issue" % server_base_url
-        base64string = base64.encodestring('%s:%s' % (user, password))[:-1]
+        base64string = base64.encodebytes('%s:%s' % (user, password))[:-1]
         # pylint: disable=undefined-variable
         request = urllib2.Request(complete_url, json.dumps(data),
                                   {'Content-Type': 'application/json'})

helpers/utils.py

@@ -793,4 +793,4 @@ def revoke_admin_right(domipaddress, remote_login, remote_password,
             "[1]; net localgroup $group %s /delete\"" % remote_login
         exec_command_win(cmd, domipaddress, remote_login, remote_password)
     else:
-        raise("Not implemented.")
+        raise Exception("Not implemented.")

tests/test_stub.py

@@ -1,7 +1,6 @@
 import os
 import platform
 import pytest
-import settings
 
 
 @pytest.mark.test_stub

tests_install/fail_test.py

@@ -1,7 +1,6 @@
 import os
 import platform
 import pytest
-import settings
 
 
 def fail_test(request):