Retrieves a list of Relay Servers configured for an Unwired Server cluster.
List<RelayServerVO> getRelayServers() throws SUPAdminException;
If successful, returns an object of the specified type (can be null). If unsuccessful, returns SUPAdminException.
// Get all relay servers configured for the Unwired Server cluster.
List<RelayServerVO> relayServers = supCluster.getRelayServers();
for (RelayServerVO relayServer : relayServers) {
	// Print relay server info
	System.out.println("=========Begin Relay Server Info=========");
	System.out.println("Host: " + relayServer.getHost());
	System.out.println("HTTP port: " + relayServer.getPort());
	System.out.println("HTTPS port: " + relayServer.getSecurePort());
	System.out.println("URL suffix: " + relayServer.getUrlSuffix());
	// Print farm info of this relay server
	System.out.println("======Farms within this relays server======");
	for (FarmVO farm : relayServer.getFarms()) {
		System.out.println("  " + farm);
		// print server node info of this farm
		System.out.println("===Server nodes within this farm===");
		for (ServerNodeVO serverNode : farm.getServerNodes()) {
			System.out.println("    Server node: " + serverNode);
			// print Outbound Enabler info of this server node
			System.out.println("    Outbound enabler: "
					+ serverNode.getOutboundEnabler());
		}
	}
	System.out.println("=========End Relay Server Info=========");
}