Part of a fix for DIRAPI-151 (Result codes from extended operations are lost).

Added backwards compatibility for old command line system properties:
- default.controls
- extra.controls
- default.extendedOperation.requests
- default.extendedOperation.responses
- extra.extendedOperations

git-svn-id: https://svn.apache.org/repos/asf/directory/shared/trunk@1510415 13f79535-47bb-0310-9956-ffa450edef68