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/controllers/transactions_controller_test.rb

@@ -2,8 +2,8 @@ require "test_helper"
 
 class TransactionsControllerTest < ActionDispatch::IntegrationTest
   setup do
-    sign_in @user = users(:bob)
-    @transaction = transactions(:one)
+    sign_in @user = users(:family_admin)
+    @transaction = transactions(:checking_one)
   end
 
   test "should get index" do