Rubocop support for providers/*.rb

* Using single .rubocop.yml

Addresses: blueprint rubocop-for-identity
Change-Id: Ie0f56e57d47a1953011657aef741ba9c5f13c37f
Rubocop support for spec/*.rb

Change-Id: Id86d34888632a23f58faa91a5c81b52bc2fc4981
Addresses: blueprint rubocop-for-identity
Remove Berksfile.lock from dev branches

blueprint remove-berksfile-lock-from-dev-branches

Change-Id: I9b9e4661c444d9d838639be3132365f4f0d1cb50
Merge "Rubocop support for spec/*.rb"