Steps to reproduce:

1. Create new Content Type Group - name it "Test Group".
2. Create any Content Type under this Group.
3. Run php bin/console ezplatform:graphql:generate-schema command.
4. Observe the generated files in app/config/graphql/ezplatform.

Result:
There is no DomainGroupTestGroup.types.yml file or similar.

Expected result:
You should see the schema for "Test Group" Content Type Group.