Use batch request to grab and save Facebook test user information

code.js

args.batch.push({
    method                      : "GET",
    name                        : "get-users",
    relative_url                : "/"+app.id+"/accounts/test-users",
    omit_response_on_success    : false
});

args.batch.push({
    method        : "GET",
    relative_url  : "?ids={result=get-users:$.data.*.id}"
});