fixed failing unit test in because I tried to see if picking a random nodeif all the nodes are dead over picking the one thats dead longest would work better in practice

Author: Mpdreamz

src/Elasticsearch.Net/ConnectionPool/StaticConnectionPool.cs

@@ -72,7 +72,7 @@ public virtual Uri GetNext(int? initialSeed, out int seed, out bool shouldPingHi
 			} while (attempts < count);
 
 			//could not find a suitable node retrying on node that has been dead longest.
-			return this.NodeUris[_random.Next(0, count)]; 
+			return this.NodeUris[i]; 
 		}
 
 		public virtual void MarkDead(Uri uri, int? deadTimeout, int? maxDeadTimeout)