migration: Cheat and rename the tables in the migration...

This needs to be done to work with newer spree that do not have
the upgrade path from 0.6 to 1.3... in the production environment
this was not noticed as the rename_table was doing this migration
for us..

db/migrate/20120801104503_dhl_shipping_details.rb

@@ -1,9 +1,9 @@
 class DhlShippingDetails < ActiveRecord::Migration
   def self.up
-      add_column :shipping_methods, :method_details, :string
+      add_column :spree_shipping_methods, :method_details, :string
   end
 
   def self.down
-      remove_column :shipping_methods, :method_details
+      remove_column :spree_shipping_methods, :method_details
   end
 end

db/migrate/20120804143723_dhl_shipping_migration.rb

@@ -1,9 +1,9 @@
 class DhlShippingMigration < ActiveRecord::Migration
   def self.up
-     change_column :shipping_methods, :method_details, :text
+     change_column :spree_shipping_methods, :method_details, :text
   end
 
   def self.down
-     change_column :shipping_methods, :method_details, :string
+     change_column :spree_shipping_methods, :method_details, :string
   end
 end