Make @​Retryable timeout tests more robust

See gh-35963

spring-context/src/test/java/org/springframework/resilience/ReactiveRetryInterceptorTests.java

@@ -481,23 +481,23 @@ class ReactiveRetryInterceptorTests {
 			});
 		}
 
-		@Retryable(timeout = 5, delay = 0)
+		@Retryable(timeout = 20, delay = 0)
 		public Mono<Object> retryOperationWithTimeoutExceededAfterFirstRetry() {
 			return Mono.fromCallable(() -> {
 				counter.incrementAndGet();
 				if (counter.get() == 2) {
-					Thread.sleep(10);
+					Thread.sleep(50);
 				}
 				throw new IOException(counter.toString());
 			});
 		}
 
-		@Retryable(timeout = 5, delay = 0)
+		@Retryable(timeout = 20, delay = 0)
 		public Mono<Object> retryOperationWithTimeoutExceededAfterSecondRetry() {
 			return Mono.fromCallable(() -> {
 				counter.incrementAndGet();
 				if (counter.get() == 3) {
-					Thread.sleep(10);
+					Thread.sleep(50);
 				}
 				throw new IOException(counter.toString());
 			});

spring-context/src/test/java/org/springframework/resilience/RetryInterceptorTests.java

@@ -439,20 +439,20 @@ class RetryInterceptorTests {
 			throw new IOException(Integer.toString(counter));
 		}
 
-		@Retryable(timeout = 5, delay = 0)
+		@Retryable(timeout = 20, delay = 0)
 		public void retryOperationWithTimeoutExceededAfterFirstRetry() throws Exception {
 			counter++;
 			if (counter == 2) {
-				Thread.sleep(10);
+				Thread.sleep(50);
 			}
 			throw new IOException(Integer.toString(counter));
 		}
 
-		@Retryable(timeout = 5, delay = 0)
+		@Retryable(timeout = 20, delay = 0)
 		public void retryOperationWithTimeoutExceededAfterSecondRetry() throws Exception {
 			counter++;
 			if (counter == 3) {
-				Thread.sleep(10);
+				Thread.sleep(50);
 			}
 			throw new IOException(Integer.toString(counter));
 		}