[ci script] yaml invalid,when a colon is followed by a space

yaml invalid,when a colon(:) is followed by a space.

Remove the space can be compiled successfully.

gitlab version:

GitLab Community Edition 8.14.2

gitlab-runner version:

[root@localhost home]# gitlab-runner -v

Version: 1.11.1

Git revision: a67a225

Git branch: 1-11-stable

GO version: go1.7.5

Built: Fri, 03 Mar 2017 12:35:58 +0000

OS/Arch: linux/amd64