[Convolution] Error while importing onnx model with weights. (#345)
[Convolution] Error while importing onnx model with weights. (#345)

* [Convolution] Error while imported onnx model has weights.

Fix the use_bias based on the input parameters to use bias (Ex: sqeezenet). Ref #336

* Review corrections.

tqchen/tvm,Huyuwei/tvm,sxjscience/tvm,Laurawly/tvm-1,Laurawly/tvm-1,Huyuwei/tvm,Huyuwei/tvm,dmlc/tvm,tqchen/tvm,dmlc/tvm,dmlc/tvm,Laurawly/tvm-1,dmlc/tvm,Laurawly/tvm-1,sxjscience/tvm,tqchen/tvm,Laurawly/tvm-1,Laurawly/tvm-1,tqchen/tvm,tqchen/tvm,Huyuwei/tvm,Laurawly/tvm-1,sxjscience/tvm,sxjscience/tvm,tqchen/tvm,tqchen/tvm,tqchen/tvm,Huyuwei/tvm,dmlc/tvm,sxjscience/tvm,Laurawly/tvm-1,dmlc/tvm,sxjscience/tvm,Huyuwei/tvm,sxjscience/tvm,sxjscience/tvm,dmlc/tvm,tqchen/tvm,Huyuwei/tvm,tqchen/tvm,dmlc/tvm,Laurawly/tvm-1,Huyuwei/tvm,dmlc/tvm,sxjscience/tvm,Huyuwei/tvm,Laurawly/tvm-1