test: make test-tls-connect checks more strict

Check the error code on expected errors so that the introduction of different errors in refactoring is caught.

While at it, re-order modules alphabetically per test-writing guide.

Ref: https://github.com/nodejs/node/pull/14687#issuecomment-321015055

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• commit message follows commit guidelines

Affected core subsystem(s)

test tls