Treat Master as a valid branch

src/NzbDrone.Core.Test/HealthCheck/Checks/ReleaseBranchCheckFixture.cs

@@ -28,15 +28,15 @@ namespace NzbDrone.Core.Test.HealthCheck.Checks
         [Test]
         public void should_return_warning_when_branch_not_valid()
         {
-            GivenValidBranch("master");
+            GivenValidBranch("test");
 
             Subject.Check().ShouldBeWarning();
         }
 
-        [TestCase("Develop")]
-        [TestCase("develop")]
         [TestCase("nightly")]
         [TestCase("Nightly")]
+        [TestCase("develop")]
+        [TestCase("master")]
         public void should_return_no_warning_when_branch_valid(string branch)
         {
             GivenValidBranch(branch);

src/NzbDrone.Core/Configuration/DeploymentInfoProvider.cs

@@ -33,7 +33,7 @@ namespace NzbDrone.Core.Configuration
             var releaseInfoPath = Path.Combine(bin, "release_info");
 
             PackageUpdateMechanism = UpdateMechanism.BuiltIn;
-            DefaultBranch = "develop";
+            DefaultBranch = "master";
 
             if (Path.GetFileName(bin) == "bin" && diskProvider.FileExists(packageInfoPath))
             {

src/NzbDrone.Core/HealthCheck/Checks/ReleaseBranchCheck.cs

@@ -31,6 +31,7 @@ namespace NzbDrone.Core.HealthCheck.Checks
 
         public enum ReleaseBranches
         {
+            Master,
             Develop,
             Nightly
         }