Updated Peristance layer to use the new error_hanler based on EWF error library.

Remove once use from DATABASE_ERROR_HANDLER.
Initial support transaction handling.

persistence/interface/cms_storage.e

@@ -11,7 +11,7 @@ deferred class
 
 inherit
 
-	SHARED_ERROR
+	SHARED_LOGGER
 
 feature {NONE} -- Initialization
 
@@ -19,6 +19,11 @@ feature {NONE} -- Initialization
 		do
 		end
 
+feature -- Error Handling
+
+	error_handler: ERROR_HANDLER
+			-- Error handler.
+
 feature -- Access: user
 
 	has_user: BOOLEAN