Bump src/cloud_controller_ng

Bump src/cloud_controller_ng
  Philipp Thun:
     Merge pull request #3514 from cloudfoundry/enable-Rails/EnvLocal
     Merge pull request #3517 from cloudfoundry/dependabot/bundler/nokogiri-1.15.5
     Merge pull request #3516 from cloudfoundry/dependabot/bundler/rubocop-rails-2.22.2
     Merge pull request #3515 from cloudfoundry/dependabot/bundler/public_suffix-5.0.4
  dependabot[bot]:
     build(deps): bump nokogiri from 1.15.4 to 1.15.5
     build(deps-dev): bump rubocop-rails from 2.22.1 to 2.22.2
     build(deps): bump public_suffix from 5.0.3 to 5.0.4
  M. Oleske:
     Enable Rails/EnvLocal rubocop