Log port registration error

Change-Id: Ib50f843d03deecc762269c58c9b13a8c5f3adb22
diff --git a/core/net/src/main/java/org/onosproject/net/resource/impl/ResourceDeviceListener.java b/core/net/src/main/java/org/onosproject/net/resource/impl/ResourceDeviceListener.java
index cdc4144..7ba0296 100644
--- a/core/net/src/main/java/org/onosproject/net/resource/impl/ResourceDeviceListener.java
+++ b/core/net/src/main/java/org/onosproject/net/resource/impl/ResourceDeviceListener.java
@@ -146,7 +146,7 @@
         executor.execute(() -> {
             boolean success = adminService.register(Resources.discrete(device.id()).resource());
             if (!success) {
-                log.warn("Failed to register Device: {}", device.id());
+                log.error("Failed to register Device: {}", device.id());
             }
         });
     }
@@ -162,14 +162,16 @@
     private void registerPortResource(Device device, Port port) {
         Resource portPath = Resources.discrete(device.id(), port.number()).resource();
         executor.execute(() -> {
-            adminService.register(portPath);
+            if (!adminService.register(portPath)) {
+                log.error("Failed to register Port: {}", portPath.id());
+            }
 
             queryBandwidth(device.id(), port.number())
                 .map(bw -> portPath.child(Bandwidth.class, bw.bps()))
                 .map(adminService::register)
                 .ifPresent(success -> {
                    if (!success) {
-                       log.warn("Failed to register Bandwidth for {}", portPath.id());
+                       log.error("Failed to register Bandwidth for {}", portPath.id());
                    }
                 });
 
@@ -180,7 +182,7 @@
                         .map(portPath::child)
                         .collect(Collectors.toList()));
                 if (!success) {
-                    log.warn("Failed to register VLAN IDs for {}", portPath.id());
+                    log.error("Failed to register VLAN IDs for {}", portPath.id());
                 }
             }
 
@@ -191,7 +193,7 @@
                         .map(portPath::child)
                         .collect(Collectors.toList()));
                 if (!success) {
-                    log.warn("Failed to register MPLS Labels for {}", portPath.id());
+                    log.error("Failed to register MPLS Labels for {}", portPath.id());
                 }
             }
 
@@ -202,7 +204,7 @@
                         .map(portPath::child)
                         .collect(Collectors.toList()));
                 if (!success) {
-                    log.warn("Failed to register lambdas for {}", portPath.id());
+                    log.error("Failed to register lambdas for {}", portPath.id());
                 }
             }
 
@@ -213,7 +215,7 @@
                         .map(portPath::child)
                         .collect(Collectors.toList()));
                 if (!success) {
-                    log.warn("Failed to register tributary slots for {}", portPath.id());
+                    log.error("Failed to register tributary slots for {}", portPath.id());
                 }
             }
         });