fix pylint in CI (#16540)
fix pylint in CI (#16540)

* fix pylint

* revert centos pylint

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