default single pipeline should not throw an exception on filter or next

Change-Id: Ic5f392db84e49221f42b09a75c16dfd9be58d100
diff --git a/drivers/src/main/java/org/onosproject/driver/pipeline/DefaultSingleTablePipeline.java b/drivers/src/main/java/org/onosproject/driver/pipeline/DefaultSingleTablePipeline.java
index 2b4cb22..d204938 100644
--- a/drivers/src/main/java/org/onosproject/driver/pipeline/DefaultSingleTablePipeline.java
+++ b/drivers/src/main/java/org/onosproject/driver/pipeline/DefaultSingleTablePipeline.java
@@ -57,9 +57,7 @@
     }
 
     @Override
-    public void filter(FilteringObjective filter) {
-        throw new UnsupportedOperationException("Single table does not filter.");
-    }
+    public void filter(FilteringObjective filter) {}
 
     @Override
     public void forward(ForwardingObjective fwd) {
@@ -126,8 +124,6 @@
     }
 
     @Override
-    public void next(NextObjective nextObjective) {
-        throw new UnsupportedOperationException("Single table does not next hop.");
-    }
+    public void next(NextObjective nextObjective) {}
 
 }