Fix for default image (RTC-32118)

'Default' image option has been removed from issue digital gift cards view.

Fix for pin code (RTC-32151)

Pin codes equal to null are allowed for Balance, Recharge and Redeem requests when the apps is verified.
In other cases requests are failed and 'Pin Code' must not be empty. message is logged.

Health check (RTC-27329)

By using a  health check endpoint in our Gift Card API you can check if GiftCard Management is available.