* enable build milvus on centos7

* Update build enviroment Centos7 dockerfile

* Update Dockerfile

* Update Dockerfile

* Update Dockerfile

* Update Dockerfile

* Update Dockerfile

* Update Dockerfile

* Update Dockerfile

* add centos7_build_deps.sh

* add centos7 build cpu version enviroment

* add centos7 on github actions

* fix bug

* fix bug

* fix bug

* update ci/docker/centos-7-core.dockerfile

* fix github actions bug

* update centos7 case on github actions

* update docker-compose.yml

* debug centos case on github actions

* debug centos case on github actions

* add centos7 deploy dockerfile

* 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