Added getFactory() method to IOFSwitch to get a message factory appropriate
for the switch's OpenFlow version.

This prevents users of the switch having to discriminate what factory to use
based on the switch OpenFlow version.

Change-Id: Iac0454856e35f4429649a6f116da34f4c048f25d
diff --git a/src/test/java/net/onrc/onos/core/linkdiscovery/LinkDiscoveryManagerTest.java b/src/test/java/net/onrc/onos/core/linkdiscovery/LinkDiscoveryManagerTest.java
index 7f848a8..8c63293 100644
--- a/src/test/java/net/onrc/onos/core/linkdiscovery/LinkDiscoveryManagerTest.java
+++ b/src/test/java/net/onrc/onos/core/linkdiscovery/LinkDiscoveryManagerTest.java
@@ -136,6 +136,7 @@
         IOFSwitch mockSwitch = createNiceMock(IOFSwitch.class);
         expect(mockSwitch.getId()).andReturn(id).anyTimes();
         expect(mockSwitch.portEnabled(EasyMock.anyShort())).andReturn(true).anyTimes();
+        expect(mockSwitch.getFactory()).andReturn(factory10).anyTimes();
         return mockSwitch;
     }