Respond to deprecation warnings

[mattscilipoti]

When I run rake, I see:

DEPRECATION WARNING: The configuration option `config.serve_static_assets` has been renamed to `config.serve_static_files` to clarify its role (it merely enables serving everything in the `public` folder and is unrelated to the asset pipeline). The `serve_static_assets` alias will be removed in Rails 5.0. Please migrate your configuration files accordingly. (called from block in <top (required)> at /Users/matt/develop/opensource/bmoreonrails.org/config/environments/test.rb:16)
Run options: --seed 33373

# Running:

DEPRECATION WARNING: You did not specify a value for the configuration option `active_support.test_order`. In Rails 5, the default value of this option will change from `:sorted` to `:random`.
To disable this warning and keep the current behavior, you can add the following line to your `config/environments/test.rb`:

  Rails.application.configure do
    config.active_support.test_order = :sorted
  end

Alternatively, you can opt into the future behavior by setting this option to `:random`. (called from test_order at /Users/matt/.rvm/gems/ruby-2.2.0/gems/activesupport-4.2.0/lib/active_support/test_case.rb:42)
..

Finished in 0.185602s, 10.7757 runs/s, 10.7757 assertions/s.

2 runs, 2 assertions, 0 failures, 0 errors, 0 skips

• config.serve_static_assets to config.serve_static_files
• active_support.test_order = :random