Fix seeds

[mgrachev]

Hello. When you run bin/setup, I get the following error:

-- add_foreign_key("line_items", "orders")
   -> 0.0045s
-- add_foreign_key("line_items", "products")
   -> 0.0028s
-- add_foreign_key("orders", "customers")
   -> 0.0028s
-- initialize_schema_migrations_table()
   -> 0.0015s
rake aborted!
Errno::ENOENT: No such file or directory @ rb_sysopen - ./db/seeds/products.yml
/Users/mgrachev/administrate/spec/example_app/db/seeds.rb:22:in `<top (required)>'
/Users/mgrachev/administrate/vendor/bundle/gems/activesupport-4.2.2/lib/active_support/dependencies.rb:268:in `load'
/Users/mgrachev/administrate/vendor/bundle/gems/activesupport-4.2.2/lib/active_support/dependencies.rb:268:in `block in load'
/Users/mgrachev/administrate/vendor/bundle/gems/activesupport-4.2.2/lib/active_support/dependencies.rb:240:in `load_dependency'
/Users/mgrachev/administrate/vendor/bundle/gems/activesupport-4.2.2/lib/active_support/dependencies.rb:268:in `load'
/Users/mgrachev/administrate/vendor/bundle/gems/railties-4.2.2/lib/rails/engine.rb:547:in `load_seed'
/Users/mgrachev/Development/Rails/work/administrate/vendor/bundle/gems/activerecord-4.2.2/lib/active_record/tasks/database_tasks.rb:250:in `load_seed'
/Users/mgrachev/administrate/vendor/bundle/gems/activerecord-4.2.2/lib/active_record/railties/databases.rake:180:in `block (2 levels) in <top (required)>'
Tasks: TOP => db:setup => db:seed
(See full trace by running task with --trace)

Minor improvements when loading seed.

[houndci-bot]

Line is too long. [90/80]
Prefer double-quoted strings unless you need single quotes to avoid extra backslashes for escaping.

[c-lliope]

Good catch, thanks! It seems that we forgot to update the seeds file when we merged #144.

[c-lliope]

Merged in f5c6058. Thanks!