SONAR suggestion - generic exceptions

Replace uses of generic RuntimeException
with more appropriate unchecked exceptions

Change-Id: If283743c2cf7252b8d280bdb788708ebbe57da9d
diff --git a/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/Controller.java b/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/Controller.java
index 6deadfd..e8dc9f0 100644
--- a/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/Controller.java
+++ b/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/Controller.java
@@ -206,7 +206,7 @@
      * @param json posted json
      * @return list of processes configured
      */
-    private List<IsisProcess> getConfig(JsonNode json) throws Exception {
+    private List<IsisProcess> getConfig(JsonNode json) {
         List<IsisProcess> isisProcessesList = new ArrayList<>();
         JsonNode jsonNodes = json;
         if (jsonNodes == null) {