Added factory and seeder for sub-bookings.

database/factories/MemberStateFactory.php

@@ -2,11 +2,10 @@
 
 use Faker\Generator as Faker;
 use Carbon\Carbon;
-use Carbon\CarbonPeriod;
 
 $factory->define(App\MemberState::class, function (Faker $faker) {
     return [
             'created_at' => Carbon::now()->format('Y-m-d H:i:s'),
-            'updated_at' => Carbon::now()->format('Y-m-d H:i:s'),
+            'updated_at' => Carbon::now()->format('Y-m-d H:i:s')
         ];
 });