* fix judge bug of errorlevel

* fix some error

* Fix xpu notest;test=kunlun

* fix

* test=kunlun

* test=kunlun

* fix optimizer init

* Enhance the detection of whether to keep the build directory

* Enhance the detection of whether to keep the build directory

* update dockerfile

* update dockerfile

* update dockerfile

* update dockerfile

* add opencv in ci

* update cidockerfile

* test nccl

* fix diff

* fix dockerfile

* update ubuntu nccl2.7.8

* update ubuntu nccl2.7.8

* Add build paddle inference;test=document_fix

* Add build paddle inference;test=document_fix

* disable ut quickly

* fix some error

* fix some error

* install urllib2 package

* use requests package instead of urllib2

* fix error caused by windows regular parameter

* fix error on windows

* fix some error

* fix with format error

* show disable ut in log

* fix some error

* fix some error

* add the handling of error in executing get_quickly_disable_ut

* add xpu test

* notest;add kunlun_test

* notest;add kunlun_test

* notest;test=kunlun

* notest;test=kunlun

* notest;test=kunlun

* notest;test=kunlun

* test=kunlun

* add pip new requirements to windows

* Increase the conditions that restrict system installation

This reverts commit 29f1560d.

* add unittest count of windows

* Reduce the number of retries

* Support python3.8

test=notest

* Fix install pr requirements.txt

* test=document_fix

* Add details to the summary and test it, test=document_fix

* Add set +e before example, test=document_fix

* Remove test code, test=document_fix

* Optimize summary information and test it, test=document_fix

* Remove test code, test=document_fix

* add timeout unittests retry

* modifed parameter use

* Restore file changes caused by pre-commit and test it, test=document_fix

* Change argument of checkout, test=document_fix

* Remove test code, test=document_fix

* add retry on mac

* fix some error

* fix with some errors

* add failed unittests retry on win system

* modified the value of retry times

* Modify data download function, and support unittests of inference APIs on windows, test=develop

* The import error compatible with py2 and py3, and fix unittests problems of inference APIs on Windows, test=develop

show unittest time even if unittest failed

* Show more possible problems with build_and_check in file paddle_build.sh, test=develop

* Remove test codes modified in file device.py for build_and_check, test=document_fix

* Fix missing blank space in file device.py, test=document_fix

* Final process via summary_check_problems function, test=document_fix