Use a simple smoke test per option for pipeline

azure-pipelines.yaml

@@ -42,4 +42,4 @@ stages:
             displayName: dotnet test
             inputs:
               command: test
-              arguments: --no-build
+              arguments: --no-build --filter Category=Smoke

test/DotNetNew.SteeltoeWebApi.Test/Test.cs

@@ -6,6 +6,7 @@ using Xunit.Abstractions;
 
 namespace Steeltoe.DotNetNew.WebApi.Test
 {
+    [Trait("Category", "Unit")]
     public abstract class Test
     {
         private readonly string _option;
@@ -16,6 +17,13 @@ namespace Steeltoe.DotNetNew.WebApi.Test
         {
         }
 
+        [Fact]
+        [Trait("Category", "Smoke")]
+        public async void TestTemplate()
+        {
+            (await TemplateSandbox()).Dispose();
+        }
+
         public Test(string option, ITestOutputHelper logger)
         {
             _option = option;