Handle dhcp_lease_duration option

Change-Id: I3b1a6ba31c55dde7e3e02e1eb3c46dddee515816
Closes-Bug: PROD-20880
diff --git a/tests/pillar/compute_dhcp.sls b/tests/pillar/compute_dhcp.sls
index 6dcf31b..b19b0d9 100644
--- a/tests/pillar/compute_dhcp.sls
+++ b/tests/pillar/compute_dhcp.sls
@@ -1,6 +1,7 @@
 neutron:
   compute:
     agent_mode: legacy
+    dhcp_lease_duration: 86400
     backend:
       engine: ml2
       tenant_network_types: "flat,vxlan"