Kinda need to fix the tests too

Author: shana

src/UnitTests/GitHub.App/Services/PullRequestServiceTests.cs

@@ -13,7 +13,7 @@ public class PullRequestServiceTests : TestBaseClass
     public void CreatePullRequestAllArgsMandatory()
     {
         var serviceProvider = Substitutes.ServiceProvider;
-        var service = new PullRequestService(Substitute.For<IGitClient>(), serviceProvider.GetGitService(), serviceProvider.GetOperatingSystem());
+        var service = new PullRequestService(Substitute.For<IGitClient>(), serviceProvider.GetGitService(), serviceProvider.GetOperatingSystem(), Substitute.For<IUsageTracker>());
 
         IRepositoryHost host = null;
         ISimpleRepositoryModel sourceRepo = null;

src/UnitTests/GitHub.App/ViewModels/PullRequestCreationViewModelTests.cs

@@ -115,7 +115,7 @@ static TestData PrepareTestData(
     public void TargetBranchDisplayNameIncludesRepoOwnerWhenFork()
     {
         var data = PrepareTestData("octokit.net", "shana", "master", "octokit", "master", "origin", true, true);
-        var prservice = new PullRequestService(data.GitClient, data.GitService, data.ServiceProvider.GetOperatingSystem());
+        var prservice = new PullRequestService(data.GitClient, data.GitService, data.ServiceProvider.GetOperatingSystem(), Substitute.For<IUsageTracker>());
         prservice.GetPullRequestTemplate(data.ActiveRepo).Returns(Observable.Empty<string>());
         var vm = new PullRequestCreationViewModel(data.RepositoryHost, data.ActiveRepo, prservice, data.NotificationService);
         Assert.Equal("octokit/master", vm.TargetBranch.DisplayName);
@@ -150,7 +150,7 @@ public async Task CreatingPRs(int testId,
         var targetBranch = data.TargetBranch;
         var ms = data.ModelService;
 
-        var prservice = new PullRequestService(data.GitClient, data.GitService, data.ServiceProvider.GetOperatingSystem());
+        var prservice = new PullRequestService(data.GitClient, data.GitService, data.ServiceProvider.GetOperatingSystem(), Substitute.For<IUsageTracker>());
         var vm = new PullRequestCreationViewModel(data.RepositoryHost, data.ActiveRepo, prservice, data.NotificationService);
 
         vm.Initialize();