FileDepot: Save depot name

Added missing :name attribute when depot_hash is updated/saved,
removed unnecessary self, and align the hashes.
Fix for not working schedule database backup

https://bugzilla.redhat.com/show_bug.cgi?id=1099341
LogManagement spec: Fixed the name for depots
MiqSchedule spec: Add 'name' attribute for @depot_hash
Merge pull request #479 from jzigmund/bz_schdule_database_backup

Unable to create a Schedule for Database Backup