Implemented CORD-1843 to avoid race condition when updating ECMPspgs.

In this commit:
 - a new mechanism in DefaultRoutingHandler to update route-path maps in all instances,
   for the entire topology, after every route event has been processesed.
 - fixed a race condition in LinkHandler
 - avoids retrying flows in the ofdpa3 driver as this issue has been fixed in the switch
 - a new CLI command to check internal link state

Change-Id: I307d0a96cc46569294d15d042b3bcb1fde735f1b
diff --git a/core/store/dist/src/main/java/org/onosproject/store/group/impl/DistributedGroupStore.java b/core/store/dist/src/main/java/org/onosproject/store/group/impl/DistributedGroupStore.java
index f820feb..1335087 100644
--- a/core/store/dist/src/main/java/org/onosproject/store/group/impl/DistributedGroupStore.java
+++ b/core/store/dist/src/main/java/org/onosproject/store/group/impl/DistributedGroupStore.java
@@ -435,7 +435,7 @@
         // Check if a group is existing with the same key
         Group existingGroup = getGroup(groupDesc.deviceId(), groupDesc.appCookie());
         if (existingGroup != null) {
-            log.info("Group already exists with the same key {} in dev:{} with id:0x{}",
+            log.debug("Group already exists with the same key {} in dev:{} with id:0x{}",
                      groupDesc.appCookie(), groupDesc.deviceId(),
                      Integer.toHexString(existingGroup.id().id()));
             return;