This implementation of FileManager will only select the .xml files from the Jenkins homedir
and the config.xml files of all the jobs and users during backup.
Performing restore when triggered form restore web page, backupHash of selected backup is passed to determine which backup in this location should be chosen
Main class of the plugin
This plugin is based on and inspired by
the backup plugin developed by: Vincent Sellier, Manufacture Fran�aise des Pneumatiques Michelin, Romain Seguy
and the PXE plugin developed by: Kohsuke Kawaguchi