Update attributes to be rubocop compliant

- Update rubocop config to handle entire repo in one file
- Update Strainerfile to run rubocop only once
- Update attributes to comply with rubocop

Change-Id: I299c2775a5a124b0af74f2e3d844cbd91f93380f
Addresses: blueprint rubocop-for-ops-database
Merge "Update attributes to be rubocop compliant"