VyOS: ansible check for config failure (#2149)

Fixes #2147

Author: ssasso

Diff for: netsim/ansible/tasks/deploy-config/vyos.yml

@@ -20,5 +20,6 @@
 
 - name: "execute config-{{ netsim_action }}.sh to deploy {{ netsim_action }} config from {{ config_template }}"
   command: "/bin/vbash {{ destination_script }}"
-  become: true
   tags: [ print_action, always ]
+  register: cmdout
+  failed_when: "'  Set failed' in cmdout.stderr_lines"

Diff for: netsim/ansible/templates/initial/vyos.j2

@@ -89,7 +89,7 @@ set interfaces {{ ns.iface_level }} {{ ns.ifname }} vrf {{ l.vrf }}
 {% endfor %}
 
 set service lldp interface all
-set service lldp interface {{ mgmt.ifname|default('eth0') }} disable
+set service lldp interface {{ mgmt.ifname|default('eth0') }} mode disable
 
 {# IPv6 RA config #}
 {% for l in netlab_interfaces if 'ipv6' in l and l.type != 'loopback' %}