move isConnected to OpenFlowSwitch interface

Change-Id: I08d1746dc05464135cabe31888f6bb3eac9c15d5
diff --git a/providers/openflow/packet/src/test/java/org/onlab/onos/provider/of/packet/impl/OpenFlowPacketProviderTest.java b/providers/openflow/packet/src/test/java/org/onlab/onos/provider/of/packet/impl/OpenFlowPacketProviderTest.java
index f547bbe..c27e084 100644
--- a/providers/openflow/packet/src/test/java/org/onlab/onos/provider/of/packet/impl/OpenFlowPacketProviderTest.java
+++ b/providers/openflow/packet/src/test/java/org/onlab/onos/provider/of/packet/impl/OpenFlowPacketProviderTest.java
@@ -406,6 +406,11 @@
         }
 
         @Override
+        public boolean isConnected() {
+            return true;
+        }
+
+        @Override
         public void disconnectSwitch() {
         }