some issues in the test protocal

I am not an expert in FSL. But I found in the test code, you extract all runs features and stack these together. And then some functions like QR working on all of them. And initFromLabelledDatas,  I am not sure this function may lead to label leakage. Because technically, if you calculate mean like that, you need to know the label information of the query data. I am looking forward to your reply.