private String buildJMXRequest(URL url, String streamName,
			String moduleName, String channelName) {
		String result = url.toString() + "/management/jolokia/read/xd." + streamName
				+ ":module=" + moduleName + ",component=MessageChannel,name=" + channelName;
		return result;
	}
Generates the Jolokia URL that will return module metrics data for a given stream, module, and 
channel name.

@param url the container url where the stream is deployed
@param streamName the name of the stream
@param moduleName the module to evaluate on the stream. Set it to * if you want all modules.
@param channelName the channel to evaluate for the module.
@return A URL to access module metrics data for the provided stream, module and channel name.
spring-xd-integration-test/src/main/java/org/springframework/xd/integration/util/XdEc2Validation.java