Make BlockingQueue API test less flaky (#800)

Author: eyalkoren

apm-agent-plugins/apm-api-plugin/src/test/java/co/elastic/apm/api/BlockingQueueContextPropagationTest.java

@@ -105,7 +105,7 @@ public void testAsyncTransactionDelegation() throws ExecutionException, Interrup
         assertThat(reportedTransaction.getTimestamp()).isEqualTo(startTime);
         assertThat(reportedTransaction.getDuration()).isBetween(
             TimeUnit.MILLISECONDS.toMicros(110),
-            TimeUnit.MILLISECONDS.toMicros(150)
+            TimeUnit.MILLISECONDS.toMicros(170)
         );
         assertThat(reporter.getSpans()).isEmpty();
     }
@@ -135,7 +135,7 @@ public void testAsyncSpanDelegation() throws ExecutionException, InterruptedExce
         assertThat(transactionTimestamp).isEqualTo(startTime);
         assertThat(reportedTransaction.getDuration()).isBetween(
             TimeUnit.MILLISECONDS.toMicros(0),
-            TimeUnit.MILLISECONDS.toMicros(50)
+            TimeUnit.MILLISECONDS.toMicros(70)
         );
 
         co.elastic.apm.agent.impl.transaction.Span reportedSpan = reporter.getFirstSpan();
@@ -145,7 +145,7 @@ public void testAsyncSpanDelegation() throws ExecutionException, InterruptedExce
         assertThat(reportedSpan.getTimestamp() - transactionTimestamp).isGreaterThanOrEqualTo(TimeUnit.MILLISECONDS.toMicros(100));
         assertThat(reportedSpan.getDuration()).isBetween(
             TimeUnit.MILLISECONDS.toMicros(10),
-            TimeUnit.MILLISECONDS.toMicros(50)
+            TimeUnit.MILLISECONDS.toMicros(70)
         );
     }