Types of external backups. Abiquo enables administrators to fully delegate the backup
functionality to end users, who will order backups that will be performed outside of Abiquo.
External backup methods: Complete (complete copy of the VM or disks), Snapshot (snapshot backup
of the entire VM or disks), Filesystem (specific backup of a directory inside the VM. Periodicity
model: (defined_hour, hourly, daily, weekly_planned, monthly)
||Collection of String List
||List of supported backup types, for example: COMPLETE, SNAPSHOT, FILESYSTEM, OPTIONS, each with its own list of subtypes. The supported subtypes may be periods or options, for example: DEFINED_HOUR, HOURLY, DAILY, WEEKLY_PLANNED, MONTHLY, REPLICATION