Revert "* Added IntegrationTest Attribute and tagged the ODETestClass"

This reverts commit 8f0096cc7b112fea8f69f391224911f624482747.

To get us back to compiling on fresh checkouts.

OpenSim/Tests/Common/IntegrationTestAttribute.cs

@@ -1,17 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-
-namespace OpenSim.Tests.Common
-{
-    [AttributeUsage(AttributeTargets.All,
-            AllowMultiple = false,
-            Inherited = true)]
-    public class IntegrationTestAttribute : LongRunningAttribute
-    {
-        public IntegrationTestAttribute()
-            : base("Integration")
-        {
-        }
-    }
-}