* Disable locking at the class-level for `update_all`

* Fixes DEPRECATION WARNING: `ActiveRecord::Result#to_hash` has been
  renamed to `to_a`. `to_hash` is deprecated and will be removed in
  Rails 6.1.

* Fix lookup of CE views

  `view_paths=` was removed so we just create a new LookupContext
  here instead of duplicating then modifying the paths

* Fix some view related spec failures

* Fix database configuration for connection pools

  ActiveRecord::Base.configurations now returns a
  ActiveRecord::DatabaseConfigurations object