Patch PlatformInfoProvider exception in Functions V1 (#1741)

Author: davidmrdavid

src/WebJobs.Extensions.DurableTask/DurableTaskExtension.cs

@@ -74,7 +74,7 @@ public class DurableTaskExtension :
         private readonly bool isOptionsConfigured;
         private readonly IApplicationLifetimeWrapper hostLifetimeService = HostLifecycleService.NoOp;
 #pragma warning disable CS0612 // Type or member is obsolete
-        private readonly IPlatformInformationService platformInformationService;
+        private IPlatformInformationService platformInformationService;
 #pragma warning restore CS0612 // Type or member is obsolete
         private IDurabilityProviderFactory durabilityProviderFactory;
         private INameResolver nameResolver;
@@ -202,7 +202,6 @@ internal DurableTaskExtension(
             : this(options, loggerFactory, nameResolver, orchestrationServiceFactories, shutdownNotification, durableHttpMessageHandlerFactory)
         {
             this.connectionStringResolver = connectionStringResolver;
-            this.platformInformationService = platformInformationService;
         }
 
         /// <summary>
@@ -503,6 +502,7 @@ private void InitializeForFunctionsV1(ExtensionConfigContext context)
             ILogger logger = this.loggerFactory.CreateLogger(LoggerCategoryName);
             this.TraceHelper = new EndToEndTraceHelper(logger, this.Options.Tracing.TraceReplayEvents);
             this.connectionStringResolver = new WebJobsConnectionStringProvider();
+            this.platformInformationService = new DefaultPlatformInformationProvider(this.nameResolver);
             this.durabilityProviderFactory = new AzureStorageDurabilityProviderFactory(
                 new OptionsWrapper<DurableTaskOptions>(this.Options),
                 this.connectionStringResolver,