bgp_group.j2: description and bugfixes

geant/gap_ansible/roles/bgp_config/templates/nokia/deploy/bgp_group.j2

@@ -2,6 +2,9 @@
                 <group alu:operation="replace">
                     <group-name>{{ group.name }}</group-name>
                     <admin-state>{{ group.admin_state | default('enable') }}</admin-state>
+                    {% if group.description is defined %}
+                    <description>{{ group.description }}</description>
+                    {% endif %}
                     {% if group.auth_key is defined %}
                     <authentication-key>{{ group.auth_key }}</authentication-key>
                     {% endif %}
@@ -53,6 +56,7 @@
                         <seconds>{{ group.hold_time }}</seconds>
                       {% if group.min_hold_time is defined %}
                         <minimum-hold-time>{{ group.min_hold_time }}</minimum-hold-time>
+                      {% endif %}
                     </hold-time>
                     {% endif %}
                     {% if group.origin_validation is defined %}