Move Spring deps to SNAPSHOTs; other changes

* Removed overridden `getMethodValue()` in the `CookieTests` which is removed from SF already
* Re-enable JDBC tests related to complex named params because of the fix in SF
* `--add-opens` for Tomcat warnings
* Upgrade to `log4j-slf4j2-impl`
* Add `cassandra.yaml` resource with increased timeouts to wait more in busy environment from Cassandra cluster

spring-integration-http/src/test/java/org/springframework/integration/http/outbound/CookieTests.java

@@ -111,12 +111,6 @@ public class CookieTests {
 					return null;
 				}
 
-				@Override
-				@Deprecated
-				public String getMethodValue() {
-					return null;
-				}
-
 				public ClientHttpResponse execute() {
 					allHeaders.add(headers);
 					return new ClientHttpResponse() {