Inheritance of AuthenticationFailureException in keeping with Java client

Author: Emile Joubert

projects/client/RabbitMQ.Client/src/client/exceptions/AuthenticationFailureException.cs

@@ -44,10 +44,9 @@ namespace RabbitMQ.Client.Exceptions
 {
     /// <summary> Thrown when the cause is  an
     /// authentication failure. </summary>
-    public class AuthenticationFailureException : Exception
+    public class AuthenticationFailureException : PossibleAuthenticationFailureException
     {
-        public AuthenticationFailureException(String msg)
-            : base(msg)
+        public AuthenticationFailureException(String msg) : base(msg)
         {
         }
     }

projects/client/RabbitMQ.Client/src/client/exceptions/PossibleAuthenticationFailureException.cs

@@ -46,8 +46,10 @@ namespace RabbitMQ.Client.Exceptions
     /// authentication failure. </summary>
     public class PossibleAuthenticationFailureException : Exception
     {
-        public PossibleAuthenticationFailureException(String msg, Exception inner)
-            : base(msg, inner)
+        public PossibleAuthenticationFailureException(String msg, Exception inner) : base(msg, inner)
+        {
+        }
+        public PossibleAuthenticationFailureException(String msg) : base(msg)
         {
         }
     }