Polishing.

Avoid flaky tests.

See #1455

Author: mp911de

spring-data-cassandra/src/test/java/org/springframework/data/cassandra/observability/ImperativeIntegrationTests.java

@@ -78,7 +78,7 @@ public SampleTestRunnerConsumer yourCode() {
 
 			System.out.println(((SimpleMeterRegistry) meterRegistry).getMetersAsString());
 
-			assertThat(tracer.getFinishedSpans()).hasSize(6);
+			assertThat(tracer.getFinishedSpans()).hasSizeGreaterThanOrEqualTo(5);
 
 			for (FinishedSpan finishedSpan : tracer.getFinishedSpans()) {