public URL getContainerUrlForSink(String streamName) {
        return getContainerHostForURL(streamName, ModuleType.sink);
    }
Gets the URL of the container where the sink was deployed using default XD Port.

@param streamName Used to find the container that contains the sink.
@return The URL that contains the sink.
spring-xd-integration-test/src/main/java/org/springframework/xd/integration/fixtures/ContainerResolver.java