install wget to be able to use ius release

otherwise, python35 isn't available.

Former-commit-id: 511827ca3ef06aea25788ec11e4bfcf776c1803d

.gitlab-ci.yml

@@ -26,7 +26,7 @@ deploy-webserver:
     - mkdir -p ~/.ssh
     - echo -e "Host *\n\tStrictHostKeyChecking no\n\n" > ~/.ssh/config
   script:
-    - yum install -y epel-release
+    - yum install -y epel-release wget
     - yum install -y gcc
     - wget https://centos7.iuscommunity.org/ius-release.rpm
     - rpm -Uvh ius-release*.rpm