[katello-devel] translation of model validation messages

[Tom McKay]

FYI, many of the validation messages built into the models are not translated. This should be a high priority item in the next iteration.

http://guides.rubyonrails.org/i18n.html#translations-for-active-record-models

Example when creating an org w/o filling in any values:

検証が失敗しました:
Label can't be blank
Label cannot contain characters other than ascii alpha numerals, '_', '-'.
Label must contain at least 1 character
Label can't be blank
Name can't be blank
Name must contain at least 1 character