Prepare fixture data for account sync tests (#493)

* Rename account balance field for clarity

`original_balance` and `original_currency` may infer that these values are "original" to the account.  In reality, they represent the "current" balance and currency on the account.

* Prepare fixture data for account sync testing

* Update to new field

* Fix conflicts

* Remove local schema change

test/models/current_test.rb

@@ -2,7 +2,7 @@ require "test_helper"
 
 class CurrentTest < ActiveSupport::TestCase
   test "family returns user family" do
-    user = users(:bob)
+    user = users(:family_admin)
     Current.user = user
     assert_equal user.family, Current.family
   end