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

Change-Id: If4e07bc27cfaf8feb59397a5f104e5f663504f6e
diff --git a/core/api/src/main/java/org/onosproject/net/config/NetworkConfigService.java b/core/api/src/main/java/org/onosproject/net/config/NetworkConfigService.java
index c1eed98..8eb69a45 100644
--- a/core/api/src/main/java/org/onosproject/net/config/NetworkConfigService.java
+++ b/core/api/src/main/java/org/onosproject/net/config/NetworkConfigService.java
@@ -41,27 +41,27 @@
     /**
      * Returns the subject factory with the specified key.
      *
-     * @param subjectKey subject class key
+     * @param subjectClassKey subject class key
      * @return subject class
      */
-    SubjectFactory getSubjectFactory(String subjectKey);
+    SubjectFactory getSubjectFactory(String subjectClassKey);
 
     /**
      * Returns the subject factory for the specified class.
      *
      * @param subjectClass subject class
-     * @return subject class key
+     * @return subject class factory
      */
     SubjectFactory getSubjectFactory(Class subjectClass);
 
     /**
      * Returns the configuration class with the specified key.
      *
-     * @param subjectKey subject class key
-     * @param configKey  subject class name
+     * @param subjectClassKey subject class key
+     * @param configKey       subject class name
      * @return subject class
      */
-    Class<? extends Config> getConfigClass(String subjectKey, String configKey);
+    Class<? extends Config> getConfigClass(String subjectClassKey, String configKey);
 
     /**
      * Returns the set of subjects for which some configuration is available.