- Added status column to the fixed plan table

- Ability to delete fixed plan if there isn't any subscribed user
- Improved error handling in subscription module

.env.testing

@@ -1,6 +1,6 @@
 APP_NAME=Laravel
 APP_ENV=local
-APP_KEY=base64:Dau44h6D3cJyjYdcbJ2ZjEf52oKR5xqjQ4BrJykCh0g=
+APP_KEY=base64:XYwMGI/zlh6i2M4dc99mcRoqhJCeHwIQj7HrD0xzjG0=
 APP_DEBUG=true
 APP_URL=http://localhost
 APP_DEMO=false