ONOS-841 Renaming ONOS threads to simplify profiling.

Change-Id: I83a96bd875a0af9f3b78c06a9f9107c093b8e64e
diff --git a/providers/null/link/src/main/java/org/onosproject/provider/nil/link/impl/NullLinkProvider.java b/providers/null/link/src/main/java/org/onosproject/provider/nil/link/impl/NullLinkProvider.java
index c12991a..1caac54 100644
--- a/providers/null/link/src/main/java/org/onosproject/provider/nil/link/impl/NullLinkProvider.java
+++ b/providers/null/link/src/main/java/org/onosproject/provider/nil/link/impl/NullLinkProvider.java
@@ -93,7 +93,7 @@
     private final List<DeviceId> devices = Lists.newArrayList();
 
     private ExecutorService linkDriver = Executors.newFixedThreadPool(1,
-            namedThreads("null-link-driver"));
+            namedThreads("onos-null-link-driver"));
 
     // If true, 'flickers' links by alternating link up/down events at eventRate
     @Property(name = "flicker", boolValue = FLICKER,