Update attributes to be rubocop compliant

- Update .rubocop.yml file to correctly check attributes
- Update attributes/default.rb to be rubocop compliant

Addresses: blueprint rubocop-for-network
Change-Id: I04ff5003d0e916369d58b05d19a6f16252f3604b
Update spec files to be rubocop compliant

- Update .rubocop.yml to include spec/**
- Update spec files to be rubocop compliant
- Inlcude 'chefspec/berkshelf' in spec_helper.rb for ease of use

Change-Id: Ief01cc34cc4f9f04e6ba6437f67bfd347975c3a8
Addresses: blueprint rubocop-for-network
Merge "Update attributes to be rubocop compliant"
Merge "Update spec files to be rubocop compliant"