Re-enable tests

Author: BrennanConroy

src/Tools/dotnet-watch/test/DotNetWatcherTests.cs

@@ -22,7 +22,8 @@ public DotNetWatcherTests(ITestOutputHelper logger)
             _app = new KitchenSinkApp(logger);
         }
 
-        [Fact(Skip = "https://github.com/aspnet/AspNetCore/issues/16912")]
+        [ConditionalFact]
+        [SkipOnHelix("https://github.com/aspnet/AspNetCore/issues/8267")]
         public async Task RunsWithDotnetWatchEnvVariable()
         {
             Assert.True(string.IsNullOrEmpty(Environment.GetEnvironmentVariable("DOTNET_WATCH")), "DOTNET_WATCH cannot be set already when this test is running");

src/Tools/dotnet-watch/test/GlobbingAppTests.cs

@@ -85,7 +85,8 @@ public async Task RenameCompiledFile()
             await _app.HasRestarted();
         }
 
-        [Fact(Skip = "https://github.com/aspnet/AspNetCore/issues/16912")]
+        [ConditionalFact]
+        [SkipOnHelix("https://github.com/aspnet/AspNetCore/issues/8267")]
         public async Task ChangeExcludedFile()
         {
             await _app.StartWatcherAsync();

src/Tools/dotnet-watch/test/NoDepsAppTests.cs

@@ -42,7 +42,8 @@ public async Task RestartProcessOnFileChange()
             Assert.NotEqual(processIdentifier, processIdentifier2);
         }
 
-        [Fact(Skip = "https://github.com/aspnet/AspNetCore/issues/16912")]
+        [ConditionalFact]
+        [SkipOnHelix("https://github.com/aspnet/AspNetCore/issues/8267")]
         public async Task RestartProcessThatTerminatesAfterFileChange()
         {
             await _app.StartWatcherAsync();