fixing a deadlock situation where half of the voting power is not in the network

src/main/java/com/hypernode/ledger/controller/WebServiceEndpoints.java

@@ -437,6 +437,10 @@ public class WebServiceEndpoints
             return "Current validator node not found in Status contract";
         }
         validatorNode = validatorNodeOptional.get();
+        if(!ValidatorNode.validateConnectionString(validatorNode.getConnectionString()))
+        {
+            return "Invalid connection string";
+        }
         if(validatorNode.getAddress() == null)
         {
             Map<Integer,Integer> address = new HashMap<Integer,Integer>();