Make RetryTemplate timeout tests more robust

See gh-35963

spring-core/src/test/java/org/springframework/core/retry/RetryTemplateTests.java

@@ -517,7 +517,7 @@ class RetryTemplateTests {
 		@Test
 		void retryWithTimeoutExceededAfterFirstRetry() throws Exception {
 			RetryPolicy retryPolicy = RetryPolicy.builder()
-					.timeout(Duration.ofMillis(5))
+					.timeout(Duration.ofMillis(20))
 					.delay(Duration.ZERO)
 					.build();
 			RetryTemplate retryTemplate = new RetryTemplate(retryPolicy);
@@ -527,7 +527,7 @@ class RetryTemplateTests {
 			Retryable<String> retryable = () -> {
 				int currentInvocation = invocationCount.incrementAndGet();
 				if (currentInvocation == 2) {
-					Thread.sleep(10);
+					Thread.sleep(50);
 				}
 				throw new CustomException("Boom " + currentInvocation);
 			};
@@ -535,7 +535,7 @@ class RetryTemplateTests {
 			assertThat(invocationCount).hasValue(0);
 			assertThatExceptionOfType(RetryException.class)
 					.isThrownBy(() -> retryTemplate.execute(retryable))
-					.withMessageMatching("Retry policy for operation '.+?' exceeded timeout \\(5 ms\\); aborting execution")
+					.withMessageMatching("Retry policy for operation '.+?' exceeded timeout \\(20 ms\\); aborting execution")
 					.withCause(new CustomException("Boom 2"))
 					.satisfies(throwable -> {
 						inOrder.verify(retryListener).beforeRetry(retryPolicy, retryable);
@@ -552,7 +552,7 @@ class RetryTemplateTests {
 		@Test
 		void retryWithTimeoutExceededAfterSecondRetry() throws Exception {
 			RetryPolicy retryPolicy = RetryPolicy.builder()
-					.timeout(Duration.ofMillis(5))
+					.timeout(Duration.ofMillis(20))
 					.delay(Duration.ZERO)
 					.build();
 			RetryTemplate retryTemplate = new RetryTemplate(retryPolicy);
@@ -562,7 +562,7 @@ class RetryTemplateTests {
 			Retryable<String> retryable = () -> {
 				int currentInvocation = invocationCount.incrementAndGet();
 				if (currentInvocation == 3) {
-					Thread.sleep(10);
+					Thread.sleep(50);
 				}
 				throw new CustomException("Boom " + currentInvocation);
 			};
@@ -570,7 +570,7 @@ class RetryTemplateTests {
 			assertThat(invocationCount).hasValue(0);
 			assertThatExceptionOfType(RetryException.class)
 					.isThrownBy(() -> retryTemplate.execute(retryable))
-					.withMessageMatching("Retry policy for operation '.+?' exceeded timeout \\(5 ms\\); aborting execution")
+					.withMessageMatching("Retry policy for operation '.+?' exceeded timeout \\(20 ms\\); aborting execution")
 					.withCause(new CustomException("Boom 3"))
 					.satisfies(throwable -> {
 						var counter = new AtomicInteger(1);