INT-3909: Upgrade to Tomcat-8.0.33

JIRA: https://jira.spring.io/browse/INT-3909

Un`@Ignore` the `ClientWebSocketContainerTests` to ensure that `Tomcat-8.0.33` has the fix for the closed WebSocket session race condition.

Fix `StompIntegrationTests` test data

Clean up queue channels before each test, because of some remained extra messages during the web-socket protocol interactions,
like socket close events or similar

Fix `RedisStoreInboundChannelAdapterIntegrationTests` race conditions

Since Jedis driver is async, we not always receive a reply from the `TX-sync` component immediately.
And loop checking the Redis for the `key` after some `Thread.sleep()`

spring-integration-websocket/src/test/java/org/springframework/integration/websocket/ClientWebSocketContainerTests.java

@@ -35,7 +35,6 @@ import java.util.concurrent.TimeUnit;
 import org.apache.tomcat.websocket.WsWebSocketContainer;
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
-import org.junit.Ignore;
 import org.junit.Test;
 
 import org.springframework.web.socket.CloseStatus;
@@ -64,7 +63,6 @@ public class ClientWebSocketContainerTests {
 	}
 
 	@Test
-	@Ignore("Ignored until fix for https://bz.apache.org/bugzilla/show_bug.cgi?id=58624")
 	public void testClientWebSocketContainer() throws Exception {
 		StandardWebSocketClient webSocketClient = new StandardWebSocketClient();
 		Map<String, Object> userProperties = new HashMap<String, Object>();

spring-integration-websocket/src/test/java/org/springframework/integration/websocket/client/StompIntegrationTests.java

@@ -31,6 +31,7 @@ import java.util.Collections;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 
+import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
@@ -125,7 +126,14 @@ public class StompIntegrationTests {
 
 	@Autowired
 	@Qualifier("webSocketEvents")
-	private PollableChannel webSocketEvents;
+	private QueueChannel webSocketEvents;
+
+	@Before
+	public void setup() {
+		this.webSocketInputChannel.clear();
+		this.webSocketEvents.clear();
+	}
+
 
 	@Test
 	public void sendMessageToController() throws Exception {