Don't try to enable spaces that don't have a VLAN set

Also clean up the custom IP/bird configuration on an aggregator when
deleting a space.

DEV-2459

salt/yap/aggregator/config

@@ -2,6 +2,8 @@ YAP_ID='{{ pillar['yap']['yap_id'] }}'
 VLAN_TRUNK='{{ pillar['yap']['trunk'] }}'
 declare -A SPACES
 {% if pillar['yap']['spaces'] %}{% for name, space in pillar['yap']['spaces'].items() %}
+{% if space.get('id') %}
 SPACES[{{ name }}]='{{ space['id'] }} {{ space['vlan'] }} {{ space.get('ip', '') }}'
+{% endif %}
 
 {% endfor %}{% endif %}

yap

@@ -653,6 +653,15 @@ function space_delete() {
         done
     done
 
+    # Clean up aggregator's space IP/custom configuration automatically
+    for agg_section in $(list_sections /aggregators/); do
+        for space_path in $(list_sections $agg_section/spaces/); do
+            if [ "$(basename $space_path)" = "$space" ] ; then
+                del_section "$space_path"
+            fi
+        done
+    done
+
     del_section "/spaces/$space"
 }