ignore WindowsService tests in *nix systems.

NzbDrone.Common.Test/ServiceProviderTests.cs

@@ -18,6 +18,11 @@ namespace NzbDrone.Common.Test
         [SetUp]
         public void Setup()
         {
+            if(EnvironmentProvider.IsLinux)
+            {
+                throw new IgnoreException("Windows services aren't available in none-windows environments.");
+            }
+
             serviceProvider = new ServiceProvider();
 
             if (serviceProvider.ServiceExist(TEMP_SERVICE_NAME))

NzbDrone.Common/EnvironmentProvider.cs

@@ -44,6 +44,15 @@ namespace NzbDrone.Common
             }
         }
 
+        public static bool IsLinux
+        {
+            get
+            {
+                int p = (int)Environment.OSVersion.Platform;
+                return (p == 4) || (p == 6) || (p == 128);
+            }
+        }
+
         public static bool IsDebug
         {
             get