The db:dev_seed rake logs info as it progresses as information for the
developer. But that's not needed when ran from its tests file, and it
bloats the travis/rspec output with unnecessary information.
Now the task will always log info unless the rake task receives an
optional argument.
This cop tries to avoid state leaking between examples. The fixes done on the code don't follow the suggested path, since the usage of `before(:all)` was not really useful. By using RSpec's `let` method we achieve same goals but with much better and readable tests.
Check Cop description at http://www.rubydoc.info/gems/rubocop-rspec/RuboCop/Cop/RSpec/BeforeAfterAll
