fix(build): Add ansible timeout for failing yum installs

Change the default timeout from 10 secs to 60 secs to accomodate the delay for slurm pkg yum install tasks after running ldap_config  role
Refer #125 

openstack-ood/nodeimage.pkr.hcl

@@ -42,6 +42,7 @@ build {
     groups        = ["ood"]
     playbook_file = "./ansible/ood.yml"
     roles_path    = "./ansible/roles"
+    ansible_env_vars = ["ANSIBLE_TIMEOUT=60"]
     extra_arguments = [
       "--extra-vars", "root_ssh_key='${var.root_ssh_key}'"
     ]