Corrected output of network configuration subjectKeys in JSON output; no longer relies on subject.toString.

Change-Id: If4e07bc27cfaf8feb59397a5f104e5f663504f6e
diff --git a/core/api/src/test/java/org/onosproject/net/config/NetworkConfigServiceAdapter.java b/core/api/src/test/java/org/onosproject/net/config/NetworkConfigServiceAdapter.java
index b70d14e..7307258 100644
--- a/core/api/src/test/java/org/onosproject/net/config/NetworkConfigServiceAdapter.java
+++ b/core/api/src/test/java/org/onosproject/net/config/NetworkConfigServiceAdapter.java
@@ -29,7 +29,7 @@
     }
 
     @Override
-    public SubjectFactory getSubjectFactory(String subjectKey) {
+    public SubjectFactory getSubjectFactory(String subjectClassKey) {
         return null;
     }
 
@@ -39,7 +39,7 @@
     }
 
     @Override
-    public Class<? extends Config> getConfigClass(String subjectKey, String configKey) {
+    public Class<? extends Config> getConfigClass(String subjectClassKey, String configKey) {
         return null;
     }