Merge pull request !5073 from h.farahat/map_callback_end

Merge pull request !5130 from 治愈系潇洒哥/master

Merge pull request !5084 from mengchunyang/master

Merge pull request !5148 from zhaoting/master

Merge pull request !5170 from pengyongrong/concat

Merge pull request !5041 from hexia/shape_wrong

Merge pull request !5070 from fanglei/new_case

Merge pull request !5165 from zhaodezan/master

Merge pull request !5155 from 王东旭/opencl_convolution_fp16

Merge pull request !5145 from lyvette/parser

Merge pull request !5193 from XunDeng/pp_issue_branch

Merge pull request !5157 from xutianchun/quant_code_review

Merge pull request !5186 from peixu_ren/custom_pp_ops

Merge pull request !5135 from yangyongjie/master

Merge pull request !4933 from huangxinjing/wide-deep-checkpoint

Merge pull request !5182 from lixian/master

Merge pull request !5182 from lixian/master

Merge pull request !5136 from fary86/fix_large_for_runtime_error

Merge pull request !5156 from qianlong21st/master_fix_softdvpp_core

Merge pull request !5015 from zhengjun10/master

add ops supported fp16

Merge pull request !5167 from ling/sr

Merge pull request !5043 from liuwenhao/master

Merge pull request !5147 from yangruoqi713/scale

Merge pull request !5114 from luoyang/c-api-pyfunc

Merge pull request !5149 from gongdaguo/Memory_leak_repair

Merge pull request !5132 from byweng/master

Merge pull request !5140 from zyli2020/add_cuda_path_check

Merge pull request !5125 from anzhengqi/add-num_epochs-api

Merge pull request !4799 from shibeiji/bert_accu_steps

Merge pull request !5163 from chenzupeng/master-lite