Fix bug of undefined DEPLOY_CONFIG variable

Summary: Ref T471

Test Plan: N/A

Reviewers: peng.zhang

Reviewed By: peng.zhang

CC: yongxing

Maniphest Tasks: T471

Differential Revision: http://phabricator.n.miliao.com/D1515

git-svn-id: https://code.miliao.com/repos/xiaomi-miliao/trunk/src/cloud/infra/minos@112857 e1a62a3c-03e2-43f2-b1ff-b74bda9a2190