fix i18n load path

[dot]

current version occurs

I18n::UnknownFileType:
       can not load translations from /(...snip...)/gems/date_validator-0.8.0/locales, the file type  is not known

when using with rails.

and $ rails console

> Rails.application.config.i18n[:load_path]
=> ["...../gems/date_validator-0.8.0/locales",
 "...../gems/devise-3.5.1/config/locales/en.yml",
 "...../gems/kaminari-0.16.3/config/locales/kaminari.yml",
 "...../application/config/locales/devise.en.yml",
 "...../application//config/locales/devise.ja.yml",
 "...../application/config/locales/en.yml",
:
:

[oriolgual]

Thanks!