Jekens 配置多项目SCM GitLab+Jenkins持续集成环境

参考：

搭建GitLab+Jenkins持续集成环境图文教程 https://blog.csdn.net/ruangong1203/article/details/73065410

Jenkins中配置多项目SCM  https://blog.csdn.net/itfootball/article/details/45061093

Additional Behaviours-->Check out to a sub-directory