Add a sleep to try and avoid sporadic fails

src/test/java/org/springframework/retry/annotation/ProxyApplicationTests.java

@@ -22,9 +22,13 @@ public class ProxyApplicationTests {
 
 	@Test
 	// See gh-53
-	public void contextLoads() {
+	public void contextLoads() throws Exception {
 		int count = count();
 		runAndClose();
+		runAndClose();
+		// Let the JVM catch up
+		Thread.sleep(500L);
+		runAndClose();
 		int base = count();
 		runAndClose();
 		count = count();