validation-quickstart: frontend not showing violation errors when using endpoint method validation

[dougword]

The frontend is not showing violation errors when clicking on Try me - End point method validation button (considering there is any).

It was working in version 2.7.7.Final, and stopped working since 2.8.0.Final when it was changed from quarkus-resteasy-jackson to quarkus-resteasy-reactive-jakson.

The property that contains the validation info was parameterViolations and now it is violations.

Also, the label of the first field goes to the previous line when the alert message is shown.