"Fixing" failing UT.

--HG--
branch : dev

src/Orchard.Core.Tests/Common/Providers/CommonPartProviderTests.cs

@@ -84,7 +84,7 @@ namespace Orchard.Core.Tests.Common.Providers {
         }
 
         class TestUser : ContentPart, IUser {
-            public int Id { get { return 6655321; } }
+            public new int Id { get { return 6655321; } }
             public string UserName {get { return "x"; }}
             public string Email { get { return "y"; } }
         }

src/Orchard.Web/Modules/Orchard.Users/Models/UserPart.cs

@@ -3,10 +3,6 @@ using Orchard.Security;
 
 namespace Orchard.Users.Models {
     public sealed class UserPart : ContentPart<UserPartRecord>, IUser {
-        public int Id {
-            get { return ContentItem.Id; }
-        }
-
         public string UserName {
             get { return Record.UserName; }
             set { Record.UserName = value; }

src/Orchard/ContentManagement/IContent.cs

@@ -1,12 +1,5 @@
-using Orchard.UI;
-
-namespace Orchard.ContentManagement {
+namespace Orchard.ContentManagement {
     public interface IContent {
         ContentItem ContentItem { get; }
-
-        /// <summary>
-        /// The ContentItem's identifier.
-        /// </summary>
-        int Id { get; }
     }
 }