[MXNET-751] fix ce_loss flaky (#11971)
[MXNET-751] fix ce_loss flaky (#11971)

* add xavier initializer

* remove comment line

ptrendx/mxnet,szha/mxnet,ptrendx/mxnet,apache/incubator-mxnet,ForkedReposBak/mxnet,larroy/mxnet,reminisce/mxnet,szha/mxnet,dmlc/mxnet,eric-haibin-lin/mxnet,dmlc/mxnet,reminisce/mxnet,reminisce/mxnet,mbaijal/incubator-mxnet,sxjscience/mxnet,reminisce/mxnet,larroy/mxnet,yajiedesign/mxnet,leezu/mxnet,ptrendx/mxnet,ptrendx/mxnet,ForkedReposBak/mxnet,tlby/mxnet,yajiedesign/mxnet,leezu/mxnet,eric-haibin-lin/mxnet,DickJC123/mxnet,ForkedReposBak/mxnet,ForkedReposBak/mxnet,sxjscience/mxnet,mbaijal/incubator-mxnet,sxjscience/mxnet,larroy/mxnet,dmlc/mxnet,reminisce/mxnet,eric-haibin-lin/mxnet,dmlc/mxnet,ptrendx/mxnet,leezu/mxnet,dmlc/mxnet,sxjscience/mxnet,larroy/mxnet,larroy/mxnet,apache/incubator-mxnet,szha/mxnet,ForkedReposBak/mxnet,leezu/mxnet,szha/mxnet,reminisce/mxnet,reminisce/mxnet,szha/mxnet,ptrendx/mxnet,yajiedesign/mxnet,tlby/mxnet,sxjscience/mxnet,larroy/mxnet,ptrendx/mxnet,ForkedReposBak/mxnet,sxjscience/mxnet,DickJC123/mxnet,zhreshold/mxnet,sxjscience/mxnet,ForkedReposBak/mxnet,apache/incubator-mxnet,tlby/mxnet,larroy/mxnet,ptrendx/mxnet,larroy/mxnet,eric-haibin-lin/mxnet,zhreshold/mxnet,szha/mxnet,mbaijal/incubator-mxnet,dmlc/mxnet,sxjscience/mxnet,dmlc/mxnet,dmlc/mxnet,zhreshold/mxnet,eric-haibin-lin/mxnet,eric-haibin-lin/mxnet,zhreshold/mxnet,leezu/mxnet,reminisce/mxnet,tlby/mxnet,szha/mxnet,szha/mxnet,reminisce/mxnet,mbaijal/incubator-mxnet,tlby/mxnet,zhreshold/mxnet,szha/mxnet,zhreshold/mxnet,ptrendx/mxnet,DickJC123/mxnet,yajiedesign/mxnet,yajiedesign/mxnet,tlby/mxnet,eric-haibin-lin/mxnet,tlby/mxnet,apache/incubator-mxnet,tlby/mxnet,larroy/mxnet,zhreshold/mxnet,mbaijal/incubator-mxnet,leezu/mxnet,yajiedesign/mxnet,leezu/mxnet,zhreshold/mxnet,eric-haibin-lin/mxnet,yajiedesign/mxnet,zhreshold/mxnet,tlby/mxnet,yajiedesign/mxnet,leezu/mxnet,leezu/mxnet,mbaijal/incubator-mxnet,reminisce/mxnet,ForkedReposBak/mxnet,yajiedesign/mxnet,mbaijal/incubator-mxnet,eric-haibin-lin/mxnet,tlby/mxnet,DickJC123/mxnet,dmlc/mxnet,ptrendx/mxnet,ForkedReposBak/mxnet,mbaijal/incubator-mxnet,mbaijal/incubator-mxnet,sxjscience/mxnet