Rename deprecated attributes in budget investments

To avoid deprecation warning thrown by Globalize after gem update. We
are going to keep these attributes with different names until next
release when we will be able to destroy them.

db/migrate/20190218162141_rename_old_translatable_attibutes_in_budget_investments.rb

@@ -0,0 +1,6 @@
+class RenameOldTranslatableAttibutesInBudgetInvestments < ActiveRecord::Migration[4.2]
+  def change
+    rename_column :budget_investments, :title, :deprecated_title
+    rename_column :budget_investments, :description, :deprecated_description
+  end
+end

db/schema.rb

@@ -248,8 +248,8 @@ ActiveRecord::Schema.define(version: 20190607160900) do
   create_table "budget_investments", force: :cascade do |t|
     t.integer  "author_id"
     t.integer  "administrator_id"
-    t.string   "title"
-    t.text     "description"
+    t.string   "deprecated_title"
+    t.text     "deprecated_description"
     t.string   "external_url"
     t.bigint   "price"
     t.string   "feasibility",                      limit: 15, default: "undecided"