Added @Beta annotations to the network configuration API.

Change-Id: I6b0e4f2064509a26e546735baef087e621ad8307
diff --git a/incubator/api/src/main/java/org/onosproject/incubator/net/config/ConfigFactory.java b/incubator/api/src/main/java/org/onosproject/incubator/net/config/ConfigFactory.java
index fbda722..37b51fd 100644
--- a/incubator/api/src/main/java/org/onosproject/incubator/net/config/ConfigFactory.java
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/config/ConfigFactory.java
@@ -16,11 +16,14 @@
 package org.onosproject.incubator.net.config;
 
 
+import com.google.common.annotations.Beta;
+
 /**
  * Base abstract factory for creating configurations for the specified subject type.
  *
  * @param <S> subject class
  */
+@Beta
 public abstract class ConfigFactory<S> {
 
     private final Class<S> subjectClass;