Ensures internal link state is up to date on a restarted ONOS instance. Also fixes an NPE in FpmManager.

Change-Id: Idb0df0ef961c6bb2f3b2c3dc72957af8a4987e1b
diff --git a/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/DefaultRoutingHandler.java b/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/DefaultRoutingHandler.java
index 3aed5cc..882bbe7 100644
--- a/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/DefaultRoutingHandler.java
+++ b/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/DefaultRoutingHandler.java
@@ -268,9 +268,9 @@
             }
             currentEcmpSpgMap.entrySet().forEach(entry -> {
                 updatedEcmpSpgMap.put(entry.getKey(), entry.getValue());
-                if (log.isDebugEnabled()) {
-                    log.debug("Root switch: {}", entry.getKey());
-                    log.debug("  Current/Existing SPG: {}", entry.getValue());
+                if (log.isTraceEnabled()) {
+                    log.trace("Root switch: {}", entry.getKey());
+                    log.trace("  Current/Existing SPG: {}", entry.getValue());
                 }
             });
             Set<EdgePair> edgePairs = new HashSet<>();