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

Change-Id: If4e07bc27cfaf8feb59397a5f104e5f663504f6e
diff --git a/cli/src/main/java/org/onosproject/cli/cfg/NetworkConfigRegistryCommand.java b/cli/src/main/java/org/onosproject/cli/cfg/NetworkConfigRegistryCommand.java
index f94967e..cf58877 100644
--- a/cli/src/main/java/org/onosproject/cli/cfg/NetworkConfigRegistryCommand.java
+++ b/cli/src/main/java/org/onosproject/cli/cfg/NetworkConfigRegistryCommand.java
@@ -42,7 +42,7 @@
 
     private void print(ConfigFactory configFactory) {
         print(shortOnly ? SHORT_FMT : FMT,
-              configFactory.subjectFactory().subjectKey(),
+              configFactory.subjectFactory().subjectClassKey(),
               configFactory.configKey(),
               configFactory.subjectFactory().subjectClass().getName(),
               configFactory.configClass().getName());