Changes:
- Fixed the DIS web service interface for using Java Calendar in all methods.
- Deprecated the searchForMe method.
- Fixed the initialisation of the secretUrlTTL variable. Default: 1 week.
- Fix handling of "|" character in delegation metadata.
- Changes to the Repository interface (saving/loading lastScanTime, searching/deleting secrets) and their respective implementations (LDAP and Virtual).
- Added automatic removal of expired delegations and secrets