Ecs provider fix (#2056)

* Include cluster name in describe tasks call

* Fix poll interval to be based on seconds

src/Proto.Cluster.AmazonECS/AmazonEcsProvider.cs

@@ -140,7 +140,7 @@ private void StartClusterMonitor() =>
                         Logger.LogError(x, "Failed to get members from ECS");
                     }
 
-                    await Task.Delay(_config.PollIntervalSeconds).ConfigureAwait(false);
+                    await Task.Delay(TimeSpan.FromSeconds(_config.PollIntervalSeconds)).ConfigureAwait(false);
                 }
             }
         );

src/Proto.Cluster.AmazonECS/EcsUtils.cs

@@ -37,6 +37,7 @@ public static async Task<Member[]> GetMembers(this AmazonECSClient c, string ecs
         var describedTasks = await c.DescribeTasksAsync(new DescribeTasksRequest
             {
                 Include = { "TAGS" },
+                Cluster = ecsClusterName,
                 Tasks = instanceArns
             }
         ).ConfigureAwait(false);