Fix: problem (error) with rails db:migrate script

[linuxonrails]

Checklist

• I have read the Contribution & Best practices Guide.
• My branch is up-to-date with the upstream master branch.
• The tests pass locally with my changes.
• I have added tests that prove my fix is effective or that my feature works(if appropriate).
• I have added necessary documentation (if appropriate).

Short description of what this resolves/which issues does this fix?:

When I execute rails db:migrate I receive the following error:

rails aborted!
StandardError: An error has occurred, this and all later migrations canceled:

undefined method `add_money' for #<SplitTicketPriceInPriceAndCurrency:0x00007fb74e642640 @name="SplitTicketPriceInPriceAndCurrency", @version=20140821103643, @connection=nil>
Did you mean?  add_monetize
/home/davidm/src/linuxonrails/moraga/db/migrate/20140821103643_split_ticket_price_in_price_and_currency.rb:9:in `change'

Caused by:
NoMethodError: undefined method `add_money' for #<SplitTicketPriceInPriceAndCurrency:0x00007fb74e642640 @name="SplitTicketPriceInPriceAndCurrency", @version=20140821103643, @connection=nil>
Did you mean?  add_monetize
/home/davidm/src/linuxonrails/moraga/db/migrate/20140821103643_split_ticket_price_in_price_and_currency.rb:9:in `change'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)

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Changes proposed in this pull request:

• Apply the rails recommendation (rename add_money with add_monetize)
• The db/schema.rb was changed after apply the migrations!