Fix for issue 9633 500 error on setup wizard with memcache

[ghost]

Description

Edits lib/internal/Magento/Framework/Session/Config.php with small change to allow Setup Wizard to work if memcache is set as the save handler in env.php

Fixed Issues (if relevant)

1. Web Setup Wizard 500 error when session storage is configured to use memcache #9633: Web Setup Wizard 500 error when session storage is configured to use memcache

Manual testing scenarios

1. Install Magento 2, set sessions to memcache in env.php
2. Visit setup wizard i.e. store.com/setup/
3. Should show 500.
4. Apply fixed Config.php
5. Load /setup/ , it will now load.

[magento-cicd2]

All committers have signed the CLA.

[kokoc]

Hi @sylink,
Your fix is working great. There are two failures on travis-ci: code style and unit tests. Could you please fix the issues, so we can merge it as is. Otherwise, our internal fixes will override the author on every line of code.

[ghost]

I'm not really a developer and I don't know what most of those errors mean. I don't have time to do anything with it either to figure it out, so go nuts on your fixes.