[BUG] Global properties configuration for batch command

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
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Description

There doesn't appear to be any documentation on how to specify the global properties when using the batch command.

This command will work since it uses -D:

java -Dmodels -DmodelTests=false -DsupportingFiles -Dapis=Pets -jar openapi-generator-cli.jar batch --root-dir=dist --fail-fast -v -- *.yaml

However it would be ideal to set those properties in the YAML (or JSON) files.

openapi-generator version

4.3.1

OpenAPI declaration file content or url

Generation Details

java -Dmodels -DmodelTests=false -DsupportingFiles -Dapis=Pets -jar openapi-generator-cli.jar batch --root-dir=dist --fail-fast -v -- *.yaml

Steps to reproduce

Set the globalProperty or globalProperties key of the config YAML file and run the batch command:

java -jar openapi-generator-cli.jar batch --root-dir=dist --fail-fast -v -- *.yaml

It does not take into account the options. I have tried comma-separated value, array, and object with keys models, apis, modelTests, etc. All of the models, APIs, and tests are generated.

Related issues/PRs

N/A

Suggest a fix

The batch command should take into account a globalProperties key in the configuration files, similar to additionalProperties, and this should be documented.