ONOS-841 Renaming ONOS threads to simplify profiling.

Change-Id: I83a96bd875a0af9f3b78c06a9f9107c093b8e64e
diff --git a/core/store/dist/src/main/java/org/onosproject/store/service/impl/DatabaseManager.java b/core/store/dist/src/main/java/org/onosproject/store/service/impl/DatabaseManager.java
index 117730a..6931b66 100644
--- a/core/store/dist/src/main/java/org/onosproject/store/service/impl/DatabaseManager.java
+++ b/core/store/dist/src/main/java/org/onosproject/store/service/impl/DatabaseManager.java
@@ -218,7 +218,7 @@
             copycat.start().get();
 
             executor =
-                    newSingleThreadScheduledExecutor(namedThreads("db-heartbeat-%d"));
+                    newSingleThreadScheduledExecutor(namedThreads("onos-db-heartbeat-%d"));
             executor.scheduleWithFixedDelay(new LeaderAdvertiser(), 5, 2, TimeUnit.SECONDS);
 
         }