Integration tests project (#2083)

Move integration tests into their own project. This makes it easier to run unit tests if you don't want to (or don't have) `azurite` running, since you can `dotnet test` just that directory.

Also add a check into the `AzuriteStorage` class that will abort the entire test run if `azurite` is not running, which is simpler than reading lots of socket exceptions.

src/ApiService/IntegrationTests/Fakes/TestEndpointAuthorization.cs

@@ -0,0 +1,44 @@
+
+using System;
+using System.Net;
+using System.Threading.Tasks;
+using Microsoft.Azure.Functions.Worker.Http;
+using Microsoft.OneFuzz.Service;
+
+enum RequestType {
+    NoAuthorization,
+    User,
+    Agent,
+}
+
+sealed class TestEndpointAuthorization : EndpointAuthorization {
+    private readonly RequestType _type;
+    private readonly IOnefuzzContext _context;
+
+    public TestEndpointAuthorization(RequestType type, ILogTracer log, IOnefuzzContext context) : base(context, log) {
+        _type = type;
+        _context = context;
+    }
+
+    public override Task<HttpResponseData> CallIf(
+        HttpRequestData req,
+        Func<HttpRequestData, Task<HttpResponseData>> method,
+        bool allowUser = false,
+        bool allowAgent = false) {
+
+        if ((_type == RequestType.User && allowUser) ||
+            (_type == RequestType.Agent && allowAgent)) {
+            return method(req);
+        }
+
+        return _context.RequestHandling.NotOk(
+            req,
+            new Error(
+                ErrorCode.UNAUTHORIZED,
+                new string[] { "Unrecognized agent" }
+            ),
+            "token verification",
+            HttpStatusCode.Unauthorized
+        );
+    }
+}