private Map<String, String> getPrivateIpToPublicIP(List<RunningInstance> riList) {
		Map<String, String> privateIPMap = new HashMap<String, String>();
		Iterator<RunningInstance> runningInstanceIter = riList.iterator();
		while (runningInstanceIter.hasNext()) {
			RunningInstance ri = runningInstanceIter.next();
			privateIPMap.put(ri.getPrivateDnsName(), ri.getDnsName());
		}
		return privateIPMap;
	}
Retrieves the containers that are recognized by the adminServer.
If the test is on EC2 the IPs of the containers will be set to the external IPs versus the default internal IPs.

@param adminServer The adminserver to interrogate.
@return A Map of container servers , that is keyed on the containerID assigned by the admin server.
spring-xd-integration-test/src/test/java/org/springframework/xd/integration/test/AbstractIntegrationTest.java