* add cpu mode for built-in Faiss

* delete customization options on build stage

* delete faiss version

* delete customization options on build stage

* fix unittest problem in cpu mode

* fix unittest problem in cpu mode
Co-authored-by: Nquicksilver <zhifeng.zhang@zilliz.com>
Co-authored-by: NJin Hai <hai.jin@zilliz.com>

* specify multiple urls on sqlite_orm download stage

* fix bug

* fix bug

* specify multiple urls on opentracing download stage

* fix bug

* specify multiple urls on download stage

* delete jfrog cache

* print jenkins enviroment variables

* print jenkins enviroment variables

* fix check_ccache.sh bug

* debug

* Update Jenkinfile

* Add build enviroment resource limit on Jenkins CI

* remove Jfrog cache build option

* Custom defined name for the upload on Codecov

* Update pip source

* Update requirements

* Remove query range case

* replace arrow

* format

* update changelog

* code-style

* fix bug

* fix 2

* fix 3

* fix 4

* change build timeout on Jenkinsfile

* add test enviroment images

* update test enviroment images Dockerfile

* Use Helm version 3 on Jenkins CI

* Use Helm version 3 on Jenkins CI

* Use Helm version 3 on Jenkins CI

* Use Helm version 3 on Jenkins CI

* add github actions

* add amd64-ubuntu-18.04-cache volumes

* update core.yml in github actions

* update ci/docker/ubuntu-18.04-core.dockerfile

* update CI scripts file

* update github actions

* update github actions

* update github actions

* remove Travis CI

* update docker-compose.yml

* update ci scripts files

* update docker-compose.yml