注释JMS block

把cocoon作为一个webapp分发在Tomcat下，如果在启动Tomcat时出现警告提示：

WARN! *** JMS block is installed but jms client library not found. ***
- For the jms block to work you must install and start a JMS server and place the client jar in WEB-INF/lib.
- The default server, OpenJMS is configured in cocoon.xconf but is not bundled with Cocoon.

解决办法：
在xcoocon.conf文件里注释掉关于jms-connection-manager的配置内容即可：
<jms-connection-manager logger="core.jms">
...
</jms-connection-manager>