Randomly failing metrics test

[ST-DDT]

This test seems to still fail randomly/rarely during CI builds unfortunately I cannot reproduce this error locally.

MetricCollectingInterceptorTest > testMetricsFailedCall() FAILED
    org.opentest4j.AssertionFailedError: execution timed out after 1000 ms
        at org.junit.jupiter.api.AssertTimeout.assertTimeoutPreemptively(AssertTimeout.java:158)
        at org.junit.jupiter.api.AssertTimeout.assertTimeoutPreemptively(AssertTimeout.java:119)
        at org.junit.jupiter.api.AssertTimeout.assertTimeoutPreemptively(AssertTimeout.java:101)
        at org.junit.jupiter.api.AssertTimeout.assertTimeoutPreemptively(AssertTimeout.java:97)
        at org.junit.jupiter.api.Assertions.assertTimeoutPreemptively(Assertions.java:3323)
        at net.devh.boot.grpc.test.metric.MetricCollectingInterceptorTest.testMetricsFailedCall(MetricCollectingInterceptorTest.java:497)

        Caused by:
        org.junit.jupiter.api.AssertTimeout$ExecutionTimeoutException: Execution timed out in thread junit-timeout-thread-6
            at sun.misc.Unsafe.park(Native Method)
            at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
            at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)
            at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:997)
            at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1304)
            at java.util.concurrent.CountDownLatch.await(CountDownLatch.java:231)
            at net.devh.boot.grpc.test.metric.MetricCollectingInterceptorTest$$Lambda$1056/1236908650.execute(Unknown Source)
            at org.junit.jupiter.api.AssertTimeout.lambda$assertTimeoutPreemptively$2(AssertTimeout.java:102)
            at org.junit.jupiter.api.AssertTimeout$$Lambda$1040/1085016662.get(Unknown Source)
            at org.junit.jupiter.api.AssertTimeout.lambda$assertTimeoutPreemptively$4(AssertTimeout.java:138)
            at org.junit.jupiter.api.AssertTimeout$$Lambda$1041/196414950.call(Unknown Source)
            at java.util.concurrent.FutureTask.run(FutureTask.java:266)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
            at java.lang.Thread.run(Thread.java:748)