Unclutter test resource start error message

[geoand]

This change leads for example from this:

Unable to start Quarkus test resource io.quarkus.test.mongodb.MongoTestResource@11d234c7

to

Unable to start Quarkus test resource class io.quarkus.test.mongodb.MongoTestResource

[quarkus-bot]

Failing Jobs - Building 387b957

Status	Name	Step	Failures	Logs	Raw logs
✖	JVM Tests - JDK 11	Build	Failures	Logs	Raw logs
✔️	JVM Tests - JDK 17
✔️	JVM Tests - JDK 18

Full information is available in the Build summary check run.

Failures

⚙️ JVM Tests - JDK 11 #

- Failing: extensions/smallrye-reactive-messaging-amqp/deployment 
! Skipped: integration-tests/reactive-messaging-amqp 

📦 extensions/smallrye-reactive-messaging-amqp/deployment

✖ io.quarkus.smallrye.reactivemessaging.amqp.AnonymousAmqpTest.test line 30 - More details - Source on GitHub

org.awaitility.core.ConditionTimeoutException: Condition with io.quarkus.smallrye.reactivemessaging.amqp.AnonymousAmqpTest was not fulfilled within 1 minutes.
	at org.awaitility.core.ConditionAwaiter.await(ConditionAwaiter.java:167)
	at org.awaitility.core.CallableCondition.await(CallableCondition.java:78)