Fix set current bug for HDFS assetstore
Fix set current bug for HDFS assetstore

Also give better explanation of effective user field

sutartmelson/girder,adsorensen/girder,salamb/girder,jcfr/girder,kotfic/girder,chrismattmann/girder,adsorensen/girder,chrismattmann/girder,jcfr/girder,adsorensen/girder,RafaelPalomar/girder,Xarthisius/girder,sutartmelson/girder,Xarthisius/girder,salamb/girder,kotfic/girder,essamjoubori/girder,RafaelPalomar/girder,opadron/girder,essamjoubori/girder,opadron/girder,sutartmelson/girder,chrismattmann/girder,opadron/girder,chrismattmann/girder,RafaelPalomar/girder,jcfr/girder,essamjoubori/girder,Kitware/girder,data-exp-lab/girder,msmolens/girder,manthey/girder,RafaelPalomar/girder,data-exp-lab/girder,Kitware/girder,jbeezley/girder,sutartmelson/girder,RafaelPalomar/girder,data-exp-lab/girder,Xarthisius/girder,msmolens/girder,msmolens/girder,girder/girder,jbeezley/girder,Kitware/girder,msmolens/girder,sutartmelson/girder,Xarthisius/girder,opadron/girder,Xarthisius/girder,jcfr/girder,Kitware/girder,manthey/girder,salamb/girder,kotfic/girder,jcfr/girder,girder/girder,essamjoubori/girder,msmolens/girder,kotfic/girder,salamb/girder,jbeezley/girder,data-exp-lab/girder,chrismattmann/girder,girder/girder,manthey/girder,manthey/girder,salamb/girder,adsorensen/girder,data-exp-lab/girder,girder/girder,jbeezley/girder,kotfic/girder,essamjoubori/girder,opadron/girder,adsorensen/girder