Let rubocop exclude all for jh/qa

What does this MR do and why?

Let rubocop exclude all for jh/qa/**/* .

We can also check the style of a special qa file through:

bundle exec rubocop jh/qa/your_special_ruby_file.rb

rubocop usage help:

-L, --list-target-files          List all files RuboCop will inspect.

--force-default-config       Use default configuration even if configuration
                                     files are present in the directory tree.

-a, --auto-correct               Auto-correct offenses (only when it's safe).
        --safe-auto-correct          (same, deprecated)

cc EM @prajnamas