add dummy migration files

spec/dummy/db/migrate/20171126133835_rename_login_banner_to_old_login_banner.rb

@@ -0,0 +1,5 @@
+class RenameLoginBannerToOldLoginBanner < ActiveRecord::Migration
+  def change
+    rename_column :library_groups, :login_banner, :old_login_banner
+  end
+end

spec/dummy/db/migrate/20171126135238_add_foreign_key_to_library_group_id_on_library.rb

@@ -0,0 +1,5 @@
+class AddForeignKeyToLibraryGroupIdOnLibrary < ActiveRecord::Migration
+  def change
+    add_foreign_key :libraries, :library_groups, null: false
+  end
+end

spec/dummy/db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20160820004638) do
+ActiveRecord::Schema.define(version: 20171126135238) do
 
   create_table "accepts", force: :cascade do |t|
     t.integer  "basket_id"
@@ -485,7 +485,7 @@
     t.text     "display_name"
     t.string   "short_name",                                                       null: false
     t.text     "my_networks"
-    t.text     "login_banner"
+    t.text     "old_login_banner"
     t.text     "note"
     t.integer  "country_id"
     t.integer  "position"