Add port names to probe_switches() output

Change-Id: Ib1ff816ad5cbc6876e5dc500817444150d335bcd
diff --git a/util.py b/util.py
index 619aa05..ca044ed 100644
--- a/util.py
+++ b/util.py
@@ -24,7 +24,9 @@
             s.switch_connect(config.switches[switch_name].username,
                              config.switches[switch_name].password,
                              config.switches[switch_name].enable_password)
-            ret[switch_name] = 'Found %d ports' % len(s.switch_get_port_names())
+            ret[switch_name] = 'Found %d ports: ' % len(s.switch_get_port_names())
+            for name in s.switch_get_port_names():
+                ret[switch_name] += '%s ' % name
             s.switch_disconnect()
             del(s)
         return ret