TS: Dynamic way to get ports of various services.

private int getRecoveryManagerPort() throws IOException {
    /*    /socket-binding-group=standard-sockets/socket-binding=txn-recovery-environment:read-attribute(name=port)  */
    final ModelNode address = new ModelNode();
    address.add("socket-binding-group", "standard-sockets");
    address.add("socket-binding", "txn-recovery-environment");
    final ModelNode operation = new ModelNode();
    operation.get(OP).set(READ_ATTRIBUTE_OPERATION);
    operation.get(OP_ADDR).set(address);
    operation.get("name").set("port");
    try {
        return executeOperation(operation).asInt();
    } catch (MgmtOperationException ignored) { }
    return -1;
}