Add QuarkusProdModeTest start/stop methods and fix restassured random port

[Sgitario]

These changes allow to use QuarkusProdModeTest to cope with more complex test scenarios like failover cases. Example:

@RegisterExtension
static final QuarkusProdModeTest nodeApp = new QuartzNodeApplicationResource();

@RegisterExtension
static final QuarkusProdModeTest masterApp = new QuartzMasterApplicationResource();

@Test
public void testFailover() {
    assertMasterIsConnectedWithNode();

    // simulate node failover
    nodeApp.stop();
    assertMasterIsNotConnectedWithNode();

    nodeApp.start();
    assertMasterIsConnectedWithNode();
}

Also, about the rest assured, when we want to start our Quarkus application using a random port (quarkus.http.port=0), the QuarkusProdModeTest is setting RestAssured.defaultPort = 0 which is invalid (if you try to do given() in your test case, you will get an exception.

Fix #14961

[quarkus-bot]

Thanks for your pull request!

The title of your pull request does not follow our editorial rules. Could you have a look?

title should not end up with ellipsis (make sure the title is complete)

This message is automatically generated by a bot.