Drop "Server" from crio repo URL (#7698) (#7699)

$releasever can be 7Server, but there is no such CentOS path on
download.opensuse.org.

Use ansible_distribution_major_version instead of $releasever.

roles/container-engine/cri-o/tasks/crio_repo.yml

@@ -75,9 +75,9 @@
   yum_repository:
     name: devel_kubic_libcontainers_stable
     description: Stable Releases of Upstream github.com/containers packages (CentOS_$releasever)
-    baseurl: http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/CentOS_$releasever/
+    baseurl: http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/CentOS_{{ ansible_distribution_major_version }}/
     gpgcheck: yes
-    gpgkey: http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/CentOS_$releasever/repodata/repomd.xml.key
+    gpgkey: http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/CentOS_{{ ansible_distribution_major_version }}/repodata/repomd.xml.key
     keepcache: '0'
   when:
     - ansible_os_family == "RedHat"
@@ -87,9 +87,9 @@
   yum_repository:
     name: "devel_kubic_libcontainers_stable_cri-o_{{ crio_version }}"
     description: "CRI-O {{ crio_version }} (CentOS_$releasever)"
-    baseurl: "http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable:/cri-o:/{{ crio_version }}/CentOS_$releasever/"
+    baseurl: "http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable:/cri-o:/{{ crio_version }}/CentOS_{{ ansible_distribution_major_version }}/"
     gpgcheck: yes
-    gpgkey: "http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable:/cri-o:/{{ crio_version }}/CentOS_$releasever/repodata/repomd.xml.key"
+    gpgkey: "http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable:/cri-o:/{{ crio_version }}/CentOS_{{ ansible_distribution_major_version }}/repodata/repomd.xml.key"
   when:
     - ansible_os_family == "RedHat"
     - ansible_distribution not in ["Amazon", "Fedora"]