Fix CI for CentOS 7 (#8567)

Fix CI for CentOS 7.

tests/integration/targets/setup_pkg_mgr/tasks/main.yml

@@ -26,6 +26,12 @@
     cacheable: true
   when: ansible_os_family == "Archlinux"
 
+- shell:
+    cmd: |
+      sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/*.repo
+      sed -i 's%#baseurl=http://mirror.centos.org/%baseurl=https://vault.centos.org/%g' /etc/yum.repos.d/*.repo
+  when: ansible_distribution in 'CentOS' and ansible_distribution_major_version == '7'
+
 - shell:
     cmd: |
       sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-Linux-*.repo