Adds retry for assertions of metrics and account balances.

DistTestCore/Marketplace/MarketplaceAccess.cs

@@ -1,5 +1,4 @@
 using DistTestCore.Codex;
-using Logging;
 using NUnit.Framework;
 using NUnit.Framework.Constraints;
 using System.Numerics;
@@ -97,8 +96,11 @@ namespace DistTestCore.Marketplace
         }
 
         public void AssertThatBalance(IResolveConstraint constraint, string message = "")
+        {
+            Time.Retry(() =>
             {
                 Assert.That(GetBalance(), constraint, message);
+            }, nameof(AssertThatBalance));
         }
 
         public TestToken GetBalance()

DistTestCore/Metrics/MetricsAccess.cs

@@ -27,6 +27,8 @@ namespace DistTestCore.Metrics
         }
 
         public void AssertThat(string metricName, IResolveConstraint constraint, string message = "")
+        {
+            Time.Retry(() =>
             {
                 var metricSet = GetMetricWithTimeout(metricName);
                 var metricValue = metricSet.Values[0].Value;
@@ -34,6 +36,7 @@ namespace DistTestCore.Metrics
                 log.Log($"{node.Name} metric '{metricName}' = {metricValue}");
 
                 Assert.That(metricValue, constraint, message);
+            }, nameof(AssertThat));
         }
 
         public Metrics? GetAllMetrics()