[tests] Make sampletester greener (#10713)

* [tests][sampletester] Add nuget.org single feed to sampletester

Since we no longer upstream to nuget.org our sampletester is not
able to find packages so we create a nuget config file with a single
source to nuget.org to fix it and still be compliant.

* [tests][sampletester] Remove ConferenceVision sample, it no longer exists

* [tests][sampletester] Double TimeOut for a couple of tests

tests/sampletester/Configuration.cs

@@ -24,14 +24,21 @@ namespace Xamarin.Tests {
 		{
 			var nuget_conf = Path.Combine (root, "NuGet.config");
 			// We're cloning into a subdirectory of xamarin-macios, which already has a NuGet.config
-			// So create a Nuget.config that clears out any previous configuration, so that none of the
-			// sample tests pick up xamarin-macios' NuGet.config.
+			// So create a Nuget.config that clears out any previous configuration and adds nuget.org as
+			// single nuget source so that none of the sample tests pick up xamarin-macios' NuGet.config.
 			File.WriteAllText (nuget_conf,
 @"<?xml version=""1.0"" encoding=""utf-8""?>
 <configuration>
 	<config>
 		<clear />
 	</config>
+	<packageSources>
+		<clear />
+		<add key=""nuget.org"" value=""https://api.nuget.org/v3/index.json"" />
+	</packageSources>
+	<disabledPackageSources>
+		<clear />
+	</disabledPackageSources>
 </configuration>
 ");
 		}

tests/sampletester/Samples.cs

@@ -164,7 +164,8 @@ namespace Samples {
 
 		static IEnumerable<SampleTestData> GetSampleData ()
 		{
-			return GetSampleTestData (test_data, ORG, REPO, HASH, DEFAULT_BRANCH, DefaultTimeout);
+			// Samples.XamarinFormsTester.BuildSample(MarkupExtensions.iOS: Debug|iPhone) needs some extra time 10 minutes
+			return GetSampleTestData (test_data, ORG, REPO, HASH, DEFAULT_BRANCH, TimeSpan.FromMinutes (10));
 		}
 	}
 
@@ -189,7 +190,8 @@ namespace Samples {
 
 		static IEnumerable<SampleTestData> GetSampleData ()
 		{
-			return GetSampleTestData (test_data, ORG, REPO, HASH, DEFAULT_BRANCH, DefaultTimeout);
+			// Samples.XamarinFormsBooksTester.BuildSample(FormattedTextToggle.iOS: Release|iPhone) needs some extra time 10 minutes
+			return GetSampleTestData (test_data, ORG, REPO, HASH, DEFAULT_BRANCH, TimeSpan.FromMinutes (10));
 		}
 	}
 
@@ -249,23 +251,4 @@ namespace Samples {
 			return GetSampleTestData (test_data, ORG, REPO, HASH, DEFAULT_BRANCH, timeout: TimeSpan.FromMinutes (10));
 		}
 	}
-
-	[Category (CATEGORY)]
-	public class ConferenceVisionTester : SampleTester {
-		const string ORG = "microsoft";
-		const string REPO = "ConferenceVision";
-		const string CATEGORY = "microsoftconferencevision"; // categories can't contain dashes
-		const string HASH = "b477f99c9e23097b31168697b2c168e90c34fd4d";
-		const string DEFAULT_BRANCH = "master";
-
-		static Dictionary<string, SampleTest> test_data = new Dictionary<string, SampleTest> {
-
-		};
-
-		static IEnumerable<SampleTestData> GetSampleData ()
-		{
-			return GetSampleTestData (test_data, ORG, REPO, HASH, DEFAULT_BRANCH, DefaultTimeout);
-		}
-	}
-
 }