Add test for the redirect when req.session exits with express-session

[idurotola]

Checklist

• [x] I have read the CONTRIBUTING guidelines.
• [x] I have added test cases which verify the correct operation of this feature or patch.
• [ ] I have added documentation pertaining to this feature or patch.
• [x] The automated test suite ($ make test) executes successfully.
• [ ] The automated code linting ($ make lint) executes successfully.

[coveralls]

Pull Request Test Coverage Report for Build 18

• 8 of 8 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.06%) to 96.58%

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Totals
Change from base Build 12:	0.06%
Covered Lines:	352
Relevant Lines:	356

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💛 - Coveralls

[rwky]

merged via cli