fix upgrade procedure when in playbook (#5695)

exists role kubernetes/preinstall and not exists role container-engine

 error 'yum_repo_dir' is undefined

roles/kubernetes/preinstall/defaults/main.yml

@@ -55,3 +55,5 @@ etc_hosts_localhost_entries:
 # Minimal memory requirement in MB for safety checks
 minimal_node_memory_mb: 1024
 minimal_master_memory_mb: 1500
+
+yum_repo_dir: /etc/yum.repos.d