Enable DHCP on neutron-management interface

CCP uses eth2 interface (by default) as external network.
External network used for external access to VM and internet access from
VM.

This patch enables DHCP and NAT on external network interface.

Change-Id: I33a792afc5584bf46318bb0893c618ed1ff3b79a

utils/jenkins/default30-kargo.yaml

@@ -26,8 +26,16 @@ template:
 
       public-pool01:
         net: *pool_default
+
       neutron-pool01:
         net: *pool_default
+        params:
+          vlan_start: 1310
+          ip_reserved:
+            gateway: +1
+            l2_network_device: +1
+          ip_ranges:
+            dhcp: [+2, -32]
 
     groups:
      - name: default
@@ -58,7 +66,9 @@ template:
 
          neutron:
            address_pool: neutron-pool01
-           dhcp: false
+           dhcp: true
+           forward:
+             mode: nat
 
        nodes:
         - name: slave-0