Log added resource path on load/unload

Change-Id: I5404e338eb400ee10e3658ffbdfc80c10a14a288
diff --git a/web/api/src/main/java/org/onosproject/rest/impl/ApiDocManager.java b/web/api/src/main/java/org/onosproject/rest/impl/ApiDocManager.java
index f4a0ce1..6500e6b 100644
--- a/web/api/src/main/java/org/onosproject/rest/impl/ApiDocManager.java
+++ b/web/api/src/main/java/org/onosproject/rest/impl/ApiDocManager.java
@@ -54,11 +54,13 @@
     @Override
     public void register(ApiDocProvider provider) {
         providers.put(provider.key(), provider);
+        log.info("{} registered at {}", provider.name(), provider.key());
     }
 
     @Override
     public void unregister(ApiDocProvider provider) {
         providers.remove(provider.name());
+        log.info("{} unregistered", provider.name());
     }
 
     @Override