Add ability to specify additional physnets

Along with default external, tenant and ironic nets there
should be an ability to specify other physical networks
which customers may want to use in an openstack cluster.

Change-Id: I648d5095c534a58385da1880b18fe989684adcd0
Related-Prod: PROD-20255
diff --git a/tests/pillar/control_single.sls b/tests/pillar/control_single.sls
index 8c7821e..b584d72 100644
--- a/tests/pillar/control_single.sls
+++ b/tests/pillar/control_single.sls
@@ -16,6 +16,12 @@
       password: password
       token: token
       tenant: admin
+      physnets:
+        sriov_net:
+          mtu: 9000 # Optional, defaults to 1500
+          vlan_range: '100:200' # Optional
+        ext_net2:
+          mtu: 1500
     fwaas: false
     dns_domain: novalocal
     tunnel_type: vxlan