Allow use of validates method with MoneyValidator
The validates method requires that the MoneyValidator be available in the
ActiveModel::Validations namespace.

This lets us use validates :amount, money: { :options }.

Sponsored-by: CentroNet Marketing.
Tests for validates method
Merge remote-tracking branch 'CentroNet-Marketing/fix-validates-method'

Conflicts:
	spec/dummy/db/development.sqlite3
	spec/dummy/db/test.sqlite3