[BUG] [openapi-yaml] Config option outputFile ignored by generator

Created by: MichalFoksa

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• What's the version of OpenAPI Generator used?
• Have you search for related issues/PRs?
• What's the actual output vs expected output?

Description

According to openapi-yaml config options outputFile specifies where the generated output is written to. It looks like that output is hardcoded to openapi/openapi.yaml.

openapi-generator version

4.0.3-SNAPSHOT

Command line used for generation

java -jar "./modules/openapi-generator-cli/target/openapi-generator-cli.jar" generate \
 -i ./modules/openapi-generator/src/test/resources/3_0/petstore.yaml -g openapi-yaml  \
-o ./test --additional-properties outputFile=generated.yml

Steps to reproduce

Execute

java -jar "./modules/openapi-generator-cli/target/openapi-generator-cli.jar" generate \
 -i ./modules/openapi-generator/src/test/resources/3_0/petstore.yaml -g openapi-yaml  \
-o ./test --additional-properties outputFile=generated.yml

Expected result:

• Generated output is in ./test/generated.yml.

Actual result:

• Generated output is in ./test/openapi/openapi.yaml.

Suggest a fix

PR #3199 fixes the issue.