Revert "When scripts are sleeping, don't count that as execution time"

The approach is good but the way it is written breaks the architecture.
Rewrite follows.

This reverts commit a568f06b7f.

OpenSim/Region/ScriptEngine/Shared/Tests/LSL_ApiTest.cs

@@ -65,7 +65,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Tests
             engine.AddRegion(scene);
 
             m_lslApi = new LSL_Api();
-            m_lslApi.Initialize(engine, part, null, null, null);
+            m_lslApi.Initialize(engine, part, null, null);
         }
 
         [Test]