Use only english domains for email

For non latin locales `Faker::Internet.email` did't work, cause `Faker::Company.name` has non latin letters and `gsub(/\W/, '')`.
```
[1] pry(main)> Faker::Config.locale = 'ru'
=> "ru"
[2] pry(main)> Faker::Internet.email
=> "keenan@.org"
[3] pry(main)> Faker::Company.name
=> "ОП ХабаровскПромСнаб"
```
So, I don't think it's important to change locale in this place.