Open source Flow apps don't check Control Center's feature flag

[mshabarov]

Description of the bug

Vaadin Flow does license checking for product vaadin-commercial-cc-client only when it spots any commercial component in the project, which is wrong, as a project can fairly be an open source project that is deployed with Control Center.

Instead, Flow should:

• [ ] check this product for the apps that have no commercial products
• [ ] check this product only when com.vaadin:control-center-starter dependency is present in the classpath, e.g. by checking Class::forName for some Java class in this artifact.

This would make a call to server when it's really needed.

Expected behavior

Flow should check this product for open source apps.

Minimal reproducible example

1. Add

   <dependency>
   <groupId>com.vaadin</groupId>
   <artifactId>control-center-starter</artifactId>
   <version>1.0-SNAPSHOT</version>
   </dependency>

   to a spring skeleton starter

2. Build open source Vaadin app for production and see that Flow doesn't make this call.

Versions

• Vaadin / Flow version: 24.5.0.beta1

[vaadin-bot]

This ticket/PR has been released with Vaadin 24.5.0.beta2 and is also targeting the upcoming stable 24.5.0 version.