Up timeout for plugins to respond to evidence code refresh (#59)

Log analytics show that skatt and tilda regularly hit 15-20 seconds cold start times, causing the evidence code refresh to treat it as timed out/dead. As a triaging measure pending optimized start up times in these plugins, we up the timeout value to 25 seconds.

Author: elsand

Dan.Core/Program.cs

@@ -160,7 +160,7 @@
         services.AddHttpClient("EvidenceCodesClient", client =>
             {
                 client.DefaultRequestHeaders.Add("Accept", "application/json");
-                client.Timeout = TimeSpan.FromSeconds(10);
+                client.Timeout = TimeSpan.FromSeconds(25);
             })
             .AddHttpMessageHandler<ExceptionDelegatingHandler>();