Dubious Ownership error for /source/openapi-generator

[maly7]

When running the generator inside the container, the following error is reported, and generation fails.

/source/openapi-generator /
fatal: detected dubious ownership in repository at '/source/openapi-generator'
To add an exception for this directory, call:

	git config --global --add safe.directory /source/openapi-generator

If it helps, I'm running the generator using java-crd-cmd.sh:

java-crd-cmd.sh -n com.vmware.tanzu.apps.config -p com.vmware.tanzu.acs -l 2 -h true -o /tmp/gen-output -g true

For now, I've worked around the issue by adding RUN git config --system --add safe.directory '/source/openapi-generator' in my fork. I'm happy to contribute the change, but I wasn't sure if this would be the best fix.

[ityuhui]

I agree with @maly7's fix

And I made a PR #237 for maintainers to review this solution.