Fixed javadoc warnings & added a few deprecations.

Change-Id: I89205b08bc5fcbfed769c489609a46d420ee227e
diff --git a/src/main/java/org/onosproject/segmentrouting/config/NetworkConfigService.java b/src/main/java/org/onosproject/segmentrouting/config/NetworkConfigService.java
index 9c4ad6e..5685527 100644
--- a/src/main/java/org/onosproject/segmentrouting/config/NetworkConfigService.java
+++ b/src/main/java/org/onosproject/segmentrouting/config/NetworkConfigService.java
@@ -16,7 +16,10 @@
  *
  * TODO: return immutable objects or defensive copies of network config so that
  * users of this API do not inadvertently or maliciously change network config.
+ *
+ * @deprecated in Drake; see org.onosproject.net.config
  */
+@Deprecated
 public interface NetworkConfigService {
 
     /**