add zone test-rspec

db/migrate/20170324135138_create_zones.rb

@@ -3,6 +3,7 @@ class CreateZones < ActiveRecord::Migration[5.0]
     create_table :zones do |t|
       t.string :name, :null => false
       t.boolean :is_active, :default => true
+      t.string :created_by
       t.timestamps
     end
   end

db/migrate/20170324135335_create_seat_tables.rb

@@ -8,7 +8,7 @@ class CreateSeatTables < ActiveRecord::Migration[5.0]
       t.string :table_type, :null => false, :default => "square"
       t.float :position_x, :null => false, :default => 0.0
       t.float :position_y, :null => false, :default => 0.0
-
+      t.string :created_by
       t.timestamps
     end
   end