Various BMv2 bugfixes

Change-Id: Ia5a2a1c86b8a90ad68ddb92980377f6308e200d2
diff --git a/apps/bmv2-demo/wcmp/src/main/java/org/onosproject/bmv2/demo/app/wcmp/WcmpFabricApp.java b/apps/bmv2-demo/wcmp/src/main/java/org/onosproject/bmv2/demo/app/wcmp/WcmpFabricApp.java
index f86e5f9..2d47afb 100644
--- a/apps/bmv2-demo/wcmp/src/main/java/org/onosproject/bmv2/demo/app/wcmp/WcmpFabricApp.java
+++ b/apps/bmv2-demo/wcmp/src/main/java/org/onosproject/bmv2/demo/app/wcmp/WcmpFabricApp.java
@@ -105,7 +105,7 @@
             }
             return true;
         } catch (Bmv2RuntimeException e) {
-            log.error("Unable to init device {}: {}", deviceId, e.explain());
+            log.debug("Exception while initializing device {}: {}", deviceId, e.explain());
             return false;
         }
     }