Bug 18639: Add replacementprice field to acquisitions workflow

Bug 18639: Add replacementprice field to acquisitions workflow

To test:
 0 - Apply patches and updatedatabase
 1 - Add an order to a basket
 2 - You should note new 'Retail price field'
 3 - You should have a separate 'Replacement price' field
 4 - Enter values and ensure they are saved as expected
 5 - In the basket you should see the replacement price
 6 - Modify order and ensure value is loaded and saved correctly
 7 - Add and cancle an order and esure replacement price shows/saves
 8 - Close basket
 9 - Receive an order
10 - You should be able to edit replacement price
11 - 'retail price' field is not editable
12 - Check associated item, replacement price in item should be updated
13 - Cancel receipt, check item. receive again with new replacement
price, check item
14 - Price should be correctly updated
15 - Finish receipt, value should show in table
16 - Test with receive from file

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>