Metacat

Implement stop method in services. Stop all services when shutting down metacat. This primarily keeps scheduler from hanging with open threads.

Added generic scheduler and workflow scheduling functionality.

Add archival read funtionality (jar/kar/war files)

Roll back replication user changes. Fix code that converts access levels to integer and to text.

Introduce replication user. Use the fileutil writer methods instead of writing directly.

Beef up exception handling from file utilities. Move UtilException to MetacatUtilException to eliminate conflict with similar exception in utility package.

Separate the concept of a backup file location and a metacat external directory location. These can be totally different.

Make sure and write the shortcut to the backup directory to a directory in the users home.

Allow for backup properties to be written to context based subdirectory of the external configuration directory. This allow multiple instances of metacat to be run side by side.

Handle sessions with null ids gracefully.