single_label_weighted_sampling
single_label_weighted_sampling

Summary: When using sample weights to do weighted sampling in everstore loader, the proto size is increased by one. Update image_input_op to support this new use case

Reviewed By: chenlifei

Differential Revision: D6776709

fbshipit-source-id: 6148908881ad019b6b621413f452ea1814573a00

xzturn/caffe2,xzturn/caffe2,Yangqing/caffe2,xzturn/caffe2,xzturn/caffe2,caffe2/caffe2,Yangqing/caffe2,Yangqing/caffe2,Yangqing/caffe2,xzturn/caffe2,Yangqing/caffe2