generate erlang code after opt processing

[liamjjmcnamara]

PR checklist

• [x] Read the contribution guidelines.
• [x] Ran the shell script under ./bin/ to update Petstore sample so that CIs can verify the change. (For instance, only need to run ./bin/{LANG}-petstore.sh and ./bin/security/{LANG}-petstore.sh if updating the {LANG} (e.g. php, ruby, python, etc) code generator or {LANG} client's mustache templates). Windows batch files can be found in .\bin\windows\.
• [x] Filed the PR against the correct branch: 3.0.0 branch for changes related to OpenAPI spec 3.0. Default: master.
• [x] Copied the technical committee to review the pull request if your PR is targeting a particular programming language.

Description of the PR

This is a fix for Issue 8084

I extended the processOpts() method in ErlangServerCodegen.java to contain the (already existing) calls to supportingFiles.add, effectively moving them from the constructor. This causes the supportingFiles.add calls to happen after option processing, and thus causes the code to respect the setting of --additional-properties packageName on the commandline.

@tsloughter

[wing328]

Thanks for the PR but your commit (as shown in the Commits tab) is not linked to your Github account, which means this PR won't count as your contribution in https://github.com/swagger-api/swagger-codegen/graphs/contributors.

Let me know if you need help fixing it.

Ref: https://github.com/swagger-api/swagger-codegen/wiki/FAQ#how-can-i-update-commits-that-are-not-linked-to-my-github-account

[liamjjmcnamara]

Ah, thanks for catching that, I squashed the commits and relabeled.

[liamjjmcnamara]

CI pipeline is failing, but seemingly due to network failures upsetting sbt downloads, rather than failing tests.

[solvip]

Is there anything stopping this from being merged?